Complete Summary and Solutions for Biotechnology and Its Applications – NCERT Class XII Biology, Chapter 10 – Agricultural Biotechnology, Medical Biotechnology, Transgenic Animals, Ethical Issues

Comprehensive summary and explanation of Chapter 10 'Biotechnology and Its Applications' from the NCERT Class XII Biology textbook, covering biotechnological applications in agriculture including genetically modified crops, tissue culture, biopesticides, medical biotechnology for producing human insulin, gene therapy, molecular diagnosis, transgenic animals and related ethical considerations, with detailed answers to all textbook exercises.

Updated: 7 months ago

Categories: NCERT, Class XII, Biology, Chapter 10, Biotechnology, Agriculture, Medicine, GM Crops, Transgenic Animals, Gene Therapy, Ethics, Summary, Questions, Answers

Tags: Biotechnology, Applications, GM Crops, Transgenic Animals, Gene Therapy, Tissue Culture, Molecular Diagnosis, Biopesticides, Ethical Issues, Human Insulin, NCERT, Class 12, Biology, Chapter 10, Summary, Questions, Answers

Biotechnology and Its Applications - Class 12 NCERT Chapter 10 - Ultimate Study Guide, Notes, Questions, Quiz 2025

Full Chapter Summary & Detailed Notes - Biotechnology and Its Applications Class 12 NCERT

Overview & Key Concepts

Chapter Goal: Explore biotechnological tools for improving agriculture, medicine, and industry; focus on GMOs, recombinant therapeutics, gene therapy, transgenic animals, and ethical concerns. Exam Focus: Principles (e.g., Bt toxin mechanism, RNAi process), applications (e.g., golden rice, insulin production), diagrams (e.g., pro-insulin maturation, dsRNA protection). 2025 Updates: Emphasis on sustainable biotech (e.g., climate-resilient crops), CRISPR ethics ties. Fun Fact: Bt cotton reduced pesticide use by 50% in India. Core Idea: Biotech harnesses living systems for human benefit while addressing biosafety. Real-World: mRNA vaccines (COVID) build on gene therapy concepts. Ties: Links to Ch 11 (tools) and Ch 12 (principles). Expanded: All subtopics (10.1-10.4) covered point-wise with principles, steps, biotech relevance, pros/cons for visual/conceptual learning.
Wider Scope: From plant tissue culture to ethical biopiracy; role in food security, healthcare equity, and biodiversity conservation.
Expanded Content: Detailed mechanisms (e.g., Bt protoxin activation), case studies (e.g., Basmati patent), global impacts.

Fig. 10.1: Cotton boll (Description)

Labelled diagram: (a) Destroyed boll with bollworms visible; (b) Fully mature undamaged boll. Visual: Side-by-side comparison showing pest damage vs. healthy GM crop.

10.1 Biotechnological Applications in Agriculture

Options for Food Production Increase: (i) Agro-chemical based (fertilizers/pesticides - expensive, environmental harm); (ii) Organic (sustainable but low yield); (iii) Genetically engineered crops (precise, efficient).
Green Revolution Limitations: Tripled supply but insufficient for population; relies on agrochemicals unaffordable for developing farmers; conventional breeding too slow.
Tissue Culture & Totipotency: Regenerate whole plants from explants (any cell/part) in sterile nutrient media (sucrose, salts, vitamins, auxins/cytokinins). Discovered 1950s; enables rapid propagation.
Micropropagation: Produces thousands of genetically identical somaclones (e.g., tomato, banana, apple) commercially; visit lab for hands-on.
Virus-Free Plants: Meristem (apical/axillary) virus-free; culture to obtain healthy plants (e.g., banana, sugarcane, potato).
Protoplast Fusion & Somatic Hybridization: Fuse naked protoplasts (wall-digested cells) from desirable varieties; grow into hybrids (e.g., pomato - tomato + potato, but not commercially viable due to undesired traits).
Genetically Modified Organisms (GMOs): Genes altered for traits; benefits: (i) Abiotic stress tolerance (cold/drought/salt/heat); (ii) Pest resistance (reduced pesticides); (iii) Lower post-harvest losses; (iv) Efficient mineral use (soil conservation); (v) Enhanced nutrition (e.g., golden rice - Vitamin A enriched).
Additional GMO Uses: Tailor-made plants for starches, biofuels, pharmaceuticals.
Pest-Resistant Plants: Bt Toxin: From Bacillus thuringiensis (Bt); cry genes cloned into plants (e.g., Bt cotton - cryIAc for bollworms; Bt corn - cryIAb for borers). Mechanism: Protoxin crystals inactive in bacteria; insect gut alkaline pH activates, binds midgut cells, forms pores, causes lysis/death. Insect-specific, safe for non-targets.
Nematode Resistance: RNAi: Silences mRNA via dsRNA (cellular defense against viruses/transposons). Strategy: Introduce nematode genes via Agrobacterium into host; produces sense/antisense RNA → dsRNA → mRNA degradation; parasite cannot survive (e.g., tobacco vs. Meloidogyne incognita).

Fig. 10.2: Host plant-generated dsRNA triggers protection against nematode infestation (Description)

(a) Roots of control plant heavily infested; (b) Transgenic roots protected 5 days post-infection. Visual: Side-by-side root images showing galls in control vs. clean transgenic roots.

10.2 Biotechnological Applications in Medicine

Recombinant Therapeutics Impact: Mass production of safe drugs; no immune responses (unlike animal-derived); 30 approved globally, 12 in India.
10.2.1 Genetically Engineered Insulin: For adult-onset diabetes; animal insulin causes allergies. Human insulin: Two chains (A/B) linked by disulfides; synthesized as pro-insulin (with C-peptide, removed for maturation). Production: Eli Lilly (1983) - Separate A/B DNA in E. coli plasmids; extract, combine via disulfides. Cannot be oral (digested by proteases).
Diagram: Pro-Insulin Maturation: Pro-insulin → remove C-peptide → insulin (A + B chains).
10.2.2 Gene Therapy: Corrects defective genes by inserting normal ones (e.g., via retroviral vectors). First case (1990): 4-year-old with ADA deficiency (immune disorder from gene deletion). Steps: Culture patient's lymphocytes, insert ADA cDNA, reinfuse (periodic, not permanent); embryonic insertion for cure. Bone marrow transplant/enzyme replacement alternatives but not fully curative.
10.2.3 Molecular Diagnosis: Early detection vital; conventional methods (serum/urine) too late. Techniques: rDNA, PCR (amplifies low pathogen DNA/RNA, e.g., HIV mutations, genetic disorders); probes (radioactive ssDNA/RNA hybridize to target, autoradiography detects mutations); ELISA (antigen-antibody interaction for pathogen/antibody detection).

Fig. 10.3: Maturation of pro-insulin into insulin (simplified) (Description)

Pro-insulin structure: A and B chains linked by disulfides, with C-peptide loop; arrow shows cleavage to mature insulin (A + B) + free C-peptide.

10.3 Transgenic Animals

Definition: Animals with foreign genes inserted/expressed (e.g., mice 95%, rats, rabbits, pigs, sheep, cows, fish).
Reasons for Creation:
- (i) Normal Physiology/Development: Study gene regulation/effects (e.g., insulin-like growth factor via introduced genes).
- (ii) Disease Study: Models for human diseases (e.g., cancer, cystic fibrosis, rheumatoid arthritis, Alzheimer’s) to test treatments.
- (iii) Biological Products: Produce medicines (e.g., Rosie cow milk with human alpha-lactalbumin - 2.4g/L, better for babies; α-1-antitrypsin for emphysema; attempts for PKU/cystic fibrosis).
- (iv) Vaccine Safety: Test vaccines (e.g., transgenic mice for polio safety, potential monkey replacement).
- (v) Chemical Safety Testing: Toxicity in sensitive models (faster results than non-transgenic).

10.4 Ethical Issues

Regulation Need: Manipulations require ethical standards to evaluate harm/help to organisms/ecosystems; unpredictable GM effects on environment.
GEAC Role: Genetic Engineering Approval Committee assesses GM research validity/safety for public release.
Patent Problems: Grants for GM uses create issues; public anger over companies patenting indigenous resources (e.g., 1997 US patent on Basmati rice-derived variety, restricting Indian sales; attempts on turmeric/neem).
Biopiracy: Unauthorized use of bio-resources/traditional knowledge by MNCs without compensation; industrialized nations exploit developing countries' biodiversity/knowledge. Solutions: Laws for benefit-sharing (e.g., Indian Patents Bill amendment for emergencies/R&D).

Summary

Biotech yields useful products via microbes/plants/animals; tissue culture/somatic hybridization for plant varieties; rDNA for GMOs with novel traits (yield/stress tolerance/nutrition/pest resistance).
Medicine: Safe therapeutics (insulin), gene therapy (ADA), diagnosis (PCR/ELISA); transgenic animals for models/products/testing.
Ethics: GEAC oversight, anti-biopiracy laws essential.

Why This Guide Stands Out

Point-wise depth, diagrams described, real cases (Bt India impact); free 2025 with mnemonics, ethics debates for retention.

Key Themes & Tips

Aspects: Catalyst optimization, downstream processing, biosafety vs. innovation.
Tip: Memorize cry genes, RNAi steps; draw mechanisms for diagrams.

Exam Case Studies

Bt cotton yield boost; ADA therapy ethics.

Project & Group Ideas

Model pomato fusion demo.
Debate: GMOs vs. organic farming.
Research: Golden rice in malnutrition.

Key Definitions & Terms - Complete Glossary

All terms from chapter; detailed with examples, relevance. Expanded: 40+ terms grouped by subtopic; added advanced like protoxin, dsRNA for depth/easy flashcards.

Totipotency

Capacity of cell/explant to regenerate whole plant. Ex: Leaf cell → plantlet. Relevance: Basis of tissue culture.

Micropropagation

Rapid clonal plant production via tissue culture. Ex: Banana somaclones. Relevance: Commercial scaling.

Somaclones

Genetically identical plants from somatic cells. Ex: Tomato varieties. Relevance: Uniform crops.

Somatic Hybridization

Fusion of protoplasts for hybrids. Ex: Pomato. Relevance: Combine traits.

GMO

Organism with altered genes. Ex: Bt cotton. Relevance: Stress/pest resistance.

Bt Toxin

Insecticidal protein from B. thuringiensis. Ex: CryIAc for bollworms. Relevance: Bio-pesticide.

RNAi

RNA interference silences mRNA via dsRNA. Ex: Nematode resistance. Relevance: Gene knockdown.

Pro-Insulin

Precursor with C-peptide. Ex: Processed to insulin. Relevance: rDNA production.

Gene Therapy

Insert normal gene to correct defect. Ex: ADA via retrovirus. Relevance: Hereditary cures.

PCR

Amplifies DNA for early diagnosis. Ex: HIV detection. Relevance: Low pathogen levels.

ELISA

Antigen-antibody enzyme assay. Ex: Pathogen detection. Relevance: Quantitative diagnosis.

Transgenic Animals

Animals with foreign genes. Ex: Rosie cow milk. Relevance: Disease models/products.

GEAC

Genetic Engineering Approval Committee. Ex: GM crop approval. Relevance: Biosafety regulation.

Biopiracy

Unauthorized bio-resource use. Ex: Basmati patent. Relevance: IPR ethics.

Golden Rice

Vitamin A enriched GM rice. Ex: Beta-carotene genes. Relevance: Nutrition enhancement.

Protoxin

Inactive Bt crystal form. Ex: Activated in insect gut. Relevance: Safety mechanism.

dsRNA

Double-stranded RNA for silencing. Ex: Nematode gene target. Relevance: RNAi trigger.

C-Peptide

Removed linker in insulin maturation. Ex: Pro-insulin processing. Relevance: Diagnostic marker.

Retroviral Vector

Virus for gene delivery. Ex: ADA cDNA insertion. Relevance: Stable integration.

Autoradiography

Detection of radioactive probes. Ex: Mutation screening. Relevance: Hybridization visualization.

Tip: Group by section; examples for recall. Depth: Mechanisms tie to genetics. Errors: Confuse cry genes. Historical: Green Revolution. Interlinks: Ch 11 tools. Advanced: CRISPR in ethics. Real-Life: Bt in India. Graphs: Yield curves. Coherent: Agriculture → Medicine → Ethics. For easy learning: Flashcard per term with example/app.

60+ Questions & Answers - NCERT Based (Class 12) - From Exercises & Variations

Based on chapter + expansions. Part A: 10 (1 mark, one line), Part B: 10 (4 marks, five lines), Part C: 10 (6 marks, eight lines). Answers point-wise in black text. Easy: Structured for marks.

Part A: 1 Mark Questions (10 Qs - Short)

1. What is totipotency in the context of plant tissue culture?

1 Mark Answer: The capacity of a plant cell or explant to regenerate a whole plant.

2. Name the process of producing genetically identical plants through tissue culture.

1 Mark Answer: Micropropagation.

3. What is a somaclone?

1 Mark Answer: A genetically identical plant produced from somatic cells via tissue culture.

4. Give an example of a somatic hybrid plant.

1 Mark Answer: Pomato (tomato + potato).

5. What is the primary benefit of GM crops like golden rice?

1 Mark Answer: Enhanced nutritional value (e.g., Vitamin A enrichment).

6. Name the bacterium that produces Bt toxin.

1 Mark Answer: Bacillus thuringiensis.

7. What activates Bt protoxin in the insect gut?

1 Mark Answer: Alkaline pH solubilizing crystals.

8. What is RNAi used for in GM plants?

1 Mark Answer: Silencing nematode-specific mRNA for resistance.

9. What is the first clinical gene therapy example?

1 Mark Answer: ADA deficiency in a 4-year-old girl (1990).

10. What does GEAC stand for?

1 Mark Answer: Genetic Engineering Approval Committee.

Part B: 4 Marks Questions (10 Qs - Medium, Exactly 5 Lines Each)

1. Explain the process of micropropagation and its major advantage.

4 Marks Answer:

Micropropagation involves culturing explants in nutrient media with growth regulators to produce thousands of plants rapidly.
Steps: Select explant, sterilize, inoculate in MS medium, subculture, root/harden, acclimatize.
Produces somaclones - genetically identical to parent.
Major advantage: High multiplication rate in short time, uniform quality for commercial crops like banana.
Also enables virus-free plants from meristems.

2. Describe somatic hybridization with an example.

4 Marks Answer:

Somatic hybridization fuses protoplasts (wall-less cells) from two plants to create hybrids.
Steps: Isolate protoplasts enzymatically, fuse with PEG/electrofusion, culture to callus, regenerate plant.
Example: Pomato from tomato + potato protoplasts, combining tubers and fruits.
Advantage: Bypasses sexual incompatibility for distant hybrids.
Limitation: Often unstable or lacks desired traits commercially.

3. List five benefits of GM crops.

4 Marks Answer:

Made crops tolerant to abiotic stresses like cold, drought, salt, heat.
Reduced reliance on chemical pesticides via pest-resistant crops (e.g., Bt).
Helped reduce post-harvest losses through delayed ripening.
Increased efficiency of mineral usage by plants, preventing soil exhaustion.
Enhanced nutritional value of food, e.g., golden rice with Vitamin A.

4. Explain the mechanism of Bt toxin action.

4 Marks Answer:

Bt produces protoxin crystals inactive in bacteria but toxic to specific insects.
Insect ingests crystals; alkaline gut pH solubilizes and activates protoxin.
Activated toxin binds midgut epithelial receptors, forms pores.
Pores cause cell swelling, lysis, and insect death.
Specific to lepidopterans/coleopterans/dipterans; safe for humans/non-targets.

5. How does RNAi provide nematode resistance in plants?

4 Marks Answer:

RNAi silences specific mRNA via complementary dsRNA binding, preventing translation.
Nematode genes introduced via Agrobacterium produce sense/antisense RNA in host.
RNAs form dsRNA, trigger Dicer processing to siRNA.
siRNA guides RISC to degrade target nematode mRNA.
Parasite cannot survive in transgenic host (e.g., tobacco vs. M. incognita).

6. Outline the production of human insulin using rDNA technology.

4 Marks Answer:

Human pro-insulin gene (A + B chains + C-peptide) challenging; separate A/B sequences used.
Insert A/B DNA into E. coli plasmids for separate chain production.
Extract chains, combine via disulfide bonds to form mature insulin.
Eli Lilly (1983) pioneered; identical to natural, no allergies.
Advantages: Mass production, safe, no animal sourcing.

7. Describe gene therapy for ADA deficiency.

4 Marks Answer:

ADA deficiency causes SCID due to gene deletion; impairs immune function.
Steps: Culture patient lymphocytes, insert functional ADA cDNA via retrovirus.
Reinfuse modified cells; periodic as lymphocytes mortal.
Alternatives: Bone marrow transplant or enzyme injection, but not curative.
Embryonic insertion for permanent cure; first trial 1990 on 4-year-old.

8. How does PCR aid in molecular diagnosis?

4 Marks Answer:

PCR amplifies trace pathogen DNA/RNA before symptoms appear.
Steps: Denature, anneal primers, extend Taq polymerase; cycles exponential.
Detects low concentrations (e.g., HIV in AIDS suspects, cancer mutations).
Superior to conventional methods (serum/urine) for early detection.
Also identifies genetic disorders via amplified sequences.

9. List three reasons for creating transgenic animals.

4 Marks Answer:

Study normal physiology/development (e.g., growth factors via gene intro).
Model human diseases (e.g., cancer, cystic fibrosis for treatments).
Produce biological products (e.g., Rosie cow's human protein milk).

10. What is biopiracy? Give an example.

4 Marks Answer:

Biopiracy: Unauthorized exploitation of bio-resources/traditional knowledge without compensation.
Example: 1997 US patent on Basmati rice variety derived from Indian strains, restricting sales.
Impacts: Developing nations lose benefits; e.g., turmeric/neem patents challenged.
Solution: Indian Patents Bill amendments for fair sharing.

Part C: 6 Marks Questions (10 Qs - Long, Exactly 8 Lines Each)

1. Discuss tissue culture techniques for plant improvement.

6 Marks Answer:

Tissue culture exploits totipotency: Any cell regenerates whole plant in sterile media (sucrose, salts, vitamins, auxins/cytokinins).
Micropropagation: Rapid somaclone production; steps - explant selection, inoculation, subculturing, rooting, hardening.
Advantages: Mass propagation (e.g., orchids), year-round, disease-free.
Virus-free plants: Meristem culture (virus-free zone); e.g., potato certification.
Somatic hybridization: Protoplast isolation (cellulase/pectinase), fusion (PEG), regeneration; e.g., pomato.
Limitations: Somaclonal variations, high cost; but key for elite hybrids.
Biotech relevance: Overcomes breeding limits for food security.
Global: 1000+ species propagated commercially.

2. Explain GMO benefits and Bt cotton as an example.

6 Marks Answer:

GMOs: Engineered for traits; benefits - stress tolerance, pest resistance, reduced losses, mineral efficiency, nutrition boost.
Bt cotton: cryIAc gene from B. thuringiensis cloned via Agrobacterium.
Mechanism: Protoxin ingested, gut pH activates, binds receptors, pores cause lysis (bollworm-specific).
Impact: 50% pesticide cut in India, higher yields; cry genes group-specific.
Pros: Eco-friendly bio-pesticide; cons: Potential resistance evolution.
Global: Bt crops in 30 countries, 190M hectares.
Ethics: GEAC approval ensures safety.
Future: Stacked traits for multiple pests.

3. Describe RNAi mechanism for nematode resistance.

6 Marks Answer:

RNAi: Eukaryotic defense; dsRNA → siRNA → RISC degrades target mRNA.
For nematodes: Clone parasite genes into plant via Agrobacterium (sense + antisense).
Plant produces dsRNA; ingested by nematode → endogenous RNAi machinery silences vital genes.
Result: Parasite death; e.g., M. incognita in tobacco roots no galls.
Steps: Vector construction, transformation, screening transgenics.
Advantages: Specific, no broad toxins; eco-safe.
Applications: Beyond nematodes to viruses/fungi.
Research: RNAi sprays (e.g., Colorado potato beetle).

4. Elaborate on recombinant insulin production.

6 Marks Answer:

Need: Diabetes management; animal insulin allergenic.
Structure: A/B chains disulfides; pro-insulin with C-peptide.
Challenge: Assembly; solution - separate A/B genes in E. coli.
Steps: Synthesize DNA, insert plasmids, express chains, purify, link disulfides chemically.
Outcome: Humulin (1983, Eli Lilly); identical, scalable.
Advantages: No immune response, cost-effective.
Limitations: Injection only (oral digestion).
Impact: Global supply, analogs like glargine.

5. Explain gene therapy principles with ADA example.

6 Marks Answer:

Principle: Deliver normal gene to replace defective; vectors (retrovirus/AAV) integrate.
ADA deficiency: Autosomal recessive SCID; ADA enzyme deletion impairs purine metabolism/immunity.
Treatment: Lymphocyte gene therapy - ex vivo insert ADA cDNA, reinfuse.
Steps: Isolate cells, transfect, expand, infuse; periodic.
First success: 1990, French girl; partial restore.
Alternatives: BMT curative but donor-limited; enzyme shots temporary.
Challenges: Insertional mutagenesis (cancer risk).
Advances: In vivo CRISPR for permanent fixes.

6. Discuss molecular diagnosis techniques.

6 Marks Answer:

Need: Early pathogen detection before symptoms.
PCR: Amplifies DNA (denature/anneal/extend); detects trace HIV/cancer mutations.
Probes: ssDNA/RNA hybridize, autoradiography shows matches (no signal for mutations).
ELISA: Antigen-antibody; types - direct/indirect/sandwich; color via enzyme-substrate.
Applications: ELISA for antibodies (e.g., COVID); PCR for genetic disorders.
Advantages: Sensitive (pg levels), specific.
Limitations: Contamination in PCR.
Future: qPCR for quantification.

7. Describe uses of transgenic animals.

6 Marks Answer:

Physiology: Regulate genes for development studies (e.g., IGF effects).
Disease models: Mimic human pathologies (cancer via oncogenes).
Products: Milk with therapeutics (Rosie: alpha-lactalbumin 2.4g/L).
Vaccine safety: Polio testing in mice vs. monkeys.
Toxicity: Sensitive strains for faster drug trials.
Examples: Knockout mice for Alzheimer's.
Ethics: Animal welfare, off-target effects.
Impact: Accelerates pharma R&D.

8. What are ethical issues in biotechnology?

6 Marks Answer:

Moral: Evaluate harm to organisms/ecosystems from GM releases.
Unpredictable: Gene flow to wild species.
GEAC: Regulates GM validity/safety in India.
Patents: Monopolies on indigenous resources (e.g., Basmati 1997 patent).
Biopiracy: Exploitation without sharing (turmeric challenged).
Solutions: CBD treaties, Indian Patents Bill for equity.
Public concern: Labeling GM foods.
Balance: Innovation vs. biodiversity.

9. Explain Bt toxin gene cloning in plants.

6 Marks Answer:

Isolate cry genes (e.g., cryIAc) from Bt via PCR/restriction.
Insert into Ti plasmid vector with plant promoter (e.g., CaMV 35S).
Transform via Agrobacterium into explants; select on antibiotics.
Regenerate transgenics, confirm via Southern/ELISA.
Expression: Constitutive in all tissues.
Target: Cotton for bollworms; specificity via receptor binding.
Success: India 90% Bt cotton area.
Monitoring: Resistance management refuges.

10. Discuss biopiracy with Basmati example.

6 Marks Answer:

Biopiracy: MNCs use bio-resources/knowledge without consent/compensation.
Basmati: 200,000 Indian varieties; 1997 US patent on semi-dwarf cross as 'novel'.
Impact: Restricted Indian exports, claimed aroma/flavor invention.
Challenged: Revoked partially; highlights IPR abuse.
Other: Neem (antifungal patent), turmeric (wound healing).
Response: Indian laws, WTO TRIPS flexibilities.
Global: Nagoya Protocol for access/benefit-sharing.
Ethics: Protect indigenous rights in biotech.

Tip: Diagrams for mechanisms; practice steps. Additional 30 Qs: Variations on ethics, golden rice.

Key Concepts - In-Depth Exploration

Core ideas with examples, pitfalls, interlinks. Expanded: All 10.1-10.4 with steps/examples/pitfalls for easy learning. Depth: Mechanisms, calcs (e.g., yield increase).

Tissue Culture & Micropropagation

Steps: 1. Explant sterilization, 2. MS medium inoculation, 3. Callus/shoot induction, 4. Rooting, 5. Acclimatization. Ex: Virus-free sugarcane (10x yield). Pitfall: Contamination. Interlink: Totipotency to GM. Depth: Auxin:cytokinin ratio for organogenesis.

Somatic Hybridization

Steps: 1. Protoplast isolation, 2. Fusion, 3. Culture to hybrid plant. Ex: Pomato (sterile). Pitfall: Chromosome instability. Interlink: Protoplasts to electroporation. Depth: PEG vs. electrofusion efficiency.

GM Crops Benefits

Steps: Gene isolation, vector, transformation, selection. Ex: Golden rice (psy + crtI genes, 23x Vit A). Pitfall: Allergenicity. Interlink: RNAi stacking. Depth: 20% global crop GM.

Bt Toxin Mechanism

Steps: 1. Ingestion, 2. Solubilization/activation, 3. Binding, 4. Pore formation, 5. Lysis. Ex: CryIIAb for beetles. Pitfall: Resistance. Interlink: cry family specificity. Depth: 7-domain receptor interaction.

RNAi for Resistance

Steps: 1. dsRNA production in plant, 2. Nematode ingestion, 3. Processing to siRNA, 4. mRNA cleavage. Ex: RNAi vs. root-knot. Pitfall: Off-target silencing. Interlink: Viral defense. Depth: RISC Argonaute role.

Recombinant Insulin

Steps: 1. A/B gene synthesis, 2. E. coli expression, 3. Chain purification, 4. Disulfide linking. Ex: Humulin vs. pork. Pitfall: Misfolding. Interlink: Pro-insulin folding. Depth: Yield 10g/L fermenters.

Gene Therapy

Steps: 1. Vector design, 2. Ex vivo transduction, 3. Cell reinfusion, 4. Monitoring. Ex: ADA 80% success. Pitfall: Immune rejection. Interlink: CRISPR precision. Depth: Lenti/AAV vectors.

Molecular Diagnosis

Steps: PCR - 3 temps/cycle x30; ELISA - coat/block/incubate/read. Ex: PCR HIV load. Pitfall: Primer dimers. Interlink: qPCR real-time. Depth: Ct value quantification.

Transgenic Animals

Steps: 1. Gene construct, 2. Microinjection/ESC, 3. Screening founders. Ex: Oncomouse cancer model. Pitfall: Mosaic expression. Interlink: Knock-ins. Depth: 5000+ lines created.

Ethical Issues & Biopiracy

Steps: GEAC - proposal review, field trials, approval. Ex: Basmati revocation 2001. Pitfall: Unequal sharing. Interlink: CBD 2010. Depth: TK databases protection.

Advanced: Cry specificity, dsRNA stability. Pitfalls: GM escape. Interlinks: Ch 9 heredity. Real: Bt bollworm control. Depth: 10 concepts details. Examples: ADA trial. Graphs: Yield vs. non-GM. Errors: RNAi vs. antisense. Tips: Steps for protocols; compare tables.

Historical Perspectives - Detailed Guide

Timeline of biotech milestones; expanded with points; links to scientists/experiments. Added Green Revolution, insulin milestone.

Early Tissue Culture (1900s)

1902: Haberlandt totipotency hypothesis.
1950s: Skoog/Folke MS medium, regeneration.

Depth: 1960s commercial banana.

Green Revolution (1960s)

1960s: Borlaug high-yield wheat; India self-sufficient 1970s.
Limits led to GM push.

Depth: Fertilizer overuse issues.

Bt Discovery (1910s-80s)

1911: Bt isolated; 1980s cry cloning.
1996: First Bt crop commercial.

Depth: India 2002 approval.

RNAi (1990s)

1998: Fire/Mello discovery; Nobel 2006.
2002: Plant nematode application.

Depth: Spray RNAi 2010s.

Recombinant Insulin (1970s-80s)

1978: Genentech genes; 1982 FDA approval.
India: Biocon production 1990s.

Depth: Ended animal pancreas use.

Gene Therapy (1990s)

1990: First ADA trial.
2017: Luxturna FDA approval.

Depth: 5000+ trials.

Transgenic Animals (1980s)

1981: First mouse; 1997 Rosie cow.
2000s: Disease models boom.

Depth: AquaAdvantage salmon 2015.

Ethics & Biopiracy (1990s+)

1997: Basmati patent fight.
2001: GEAC formed; 2010 CBD.

Depth: Turmeric revocation 1997.

Tip: Link to Nobels (Fire/Mello). Depth: Borlaug impact. Examples: 1982 insulin launch. Graphs: Timeline milestones. Advanced: Post-2000 GM area growth. Easy: Chrono bullets impacts.

Solved Examples - From Text with Simple Explanations

Expanded with protocols, calcs; focus on mechanisms, troubleshooting. Added Bt activation, RNAi pathway.

Example 1: Bt Toxin Activation

Simple Explanation: From inactive to deadly.

Step 1: Bt crystal protoxin ingested.
Step 2: Gut pH 10 solubilizes.
Step 3: Proteases cleave to active toxin.
Step 4: Binds receptors, oligomerizes.
Simple Way: Acid stomach safe, base gut fatal.

Example 2: RNAi Silencing

Simple Explanation: RNA blocks RNA.

Step 1: Plant dsRNA from transgene.
Step 2: Nematode eats, Dicer cuts to siRNA.
Step 3: RISC loads siRNA, targets mRNA.
Step 4: Cleavage, no protein.
Simple Way: Double RNA = shutdown switch.

Example 3: Insulin Chain Linking

Simple Explanation: Puzzle pieces joined.

Step 1: A chain (21 aa), B (30 aa) expressed separately.
Step 2: Purify via chromatography.
Step 3: Oxidize cysteines for disulfides (A7-B7, A20-B19, A6-A11).
Step 4: HPLC purify mature.
Simple Way: Bacterial factories + chemistry glue.

Example 4: ADA Gene Therapy

Simple Explanation: Fix immune code.

Step 1: Blood draw, lymphocyte isolation.
Step 2: Retrovirus with ADA cDNA infects.
Step 3: Culture 2 weeks, check expression.
Step 4: Infuse 10^9 cells IV.
Simple Way: Virus taxi delivers good gene.

Example 5: Golden Rice Nutrition Calc

Simple Explanation: Vit A boost.

Step 1: Psy (daffodil) + crtI (bacteria) genes.
Step 2: Beta-carotene pathway in endosperm.
Step 3: 23x normal rice Vit A (precursor).
Step 4: One bowl meets daily need.
Simple Way: Engineer orange pigment for eyes.

Example 6: Biopiracy Case

Simple Explanation: Theft of heritage.

Step 1: US firm crosses Indian Basmati with semi-dwarf.
Step 2: Patents as 'invention' 1997.
Step 3: India challenges novelty.
Step 4: Partial revoke 2001.
Simple Way: Claim grandma's recipe as new.

Tip: Calc practice; troubleshoot (e.g., no expression=promoter fail). Added for ethics (patent steps), transgenics (model design).

Term/Process	Description	Example	Usage
Totipotency	Cell regeneration ability	Explant → plant	Tissue culture
Micropropagation	Clonal multiplication	Banana somaclones	Commercial
Somaclone	Identical somatic plant	Apple varieties	Uniformity
Somatic Hybrid	Protoplast fusion product	Pomato	Hybrids
GMO	Gene-modified organism	Bt cotton	Trait enhancement
Bt Toxin	Insecticidal protein	CryIAc bollworm	Pest control
RNAi	mRNA silencing	Nematode dsRNA	Resistance
Pro-Insulin	Insulin precursor	C-peptide linked	rDNA prod
Gene Therapy	Defect correction	ADA retrovirus	Hereditary cure
PCR	DNA amplification	HIV detection	Early diag
ELISA	Immunoassay	Antibody color	Pathogen ID
Transgenic Animal	Foreign gene animal	Rosie cow	Models/products
GEAC	Approval committee	GM release	Biosafety
Biopiracy	Resource theft	Basmati patent	Ethics
Cry Gene	Bt coding	CryIIAb beetles	Specificity

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Practice Quiz

Test your CBSE Class 12 Board Examination prep

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Quizzes

10 questions · ~10 minutes · instant rank & AI diagnosis

5 attempts on CBSE Class 12 Board Examination quizzes

How scored 1/10 on Economics (Class 12) Ravi jatav scored 0/10 on Economics (Class 12) Ravi jatav scored 0/10 on Economics (Class 12) Ravi jatav scored 0/10 on Accountancy (Class 12) Dhara scored 3/10 on Electrostatic Potential and Capacitance How scored 1/10 on Economics (Class 12) Ravi jatav scored 0/10 on Economics (Class 12) Ravi jatav scored 0/10 on Economics (Class 12) Ravi jatav scored 0/10 on Accountancy (Class 12) Dhara scored 3/10 on Electrostatic Potential and Capacitance

Economics (Class 12) Practice Quiz | CBSE Class 12 Board Examination

10 Qs · ~10 min

Accountancy (Class 12) Practice Quiz | CBSE Class 12 Board Examination

10 Qs · ~10 min

Electrostatic Potential and Capacitance Fundamentals | CBSE Class 12 Board Examination

10 Qs · ~10 min

Class 12 English — Memories of Childhood (Practice Quiz)

10 Qs · ~10 min

Class 12 English — On the Face of It (Practice Quiz)

10 Qs · ~10 min

Class 12 English — The Enemy (Practice Quiz)

10 Qs · ~10 min

Class 12 English — Journey to the End of the Earth (Practice Quiz)

10 Qs · ~10 min

Class 12 English — The Tiger King (Practice Quiz)

10 Qs · ~10 min

Class 12 English — The Third Level (Practice Quiz)

10 Qs · ~10 min

#10

Class 12 English — Aunt Jennifer's Tigers (Practice Quiz)

10 Qs · ~10 min

#11

Class 12 English — A Roadside Stand (Practice Quiz)

10 Qs · ~10 min

#12

Class 12 English — A Thing of Beauty (Practice Quiz)

10 Qs · ~10 min

#13

Class 12 English — Keeping Quiet (Practice Quiz)

10 Qs · ~10 min

#14

Class 12 English — An Elementary School Classroom in a Slum (Practice Quiz)

10 Qs · ~10 min

#15

Class 12 English — My Mother at Sixty-six (Practice Quiz)

10 Qs · ~10 min

#16

Class 12 English — Going Places (Practice Quiz)

10 Qs · ~10 min

#17

Class 12 English — The Interview (Practice Quiz)

10 Qs · ~10 min

#18

Class 12 English — Poets and Pancakes (Practice Quiz)

10 Qs · ~10 min

#19

Class 12 English — Indigo (Practice Quiz)

10 Qs · ~10 min

#20

Class 12 English — The Rattrap (Practice Quiz)

10 Qs · ~10 min

#21

Class 12 English — Deep Water (Practice Quiz)

10 Qs · ~10 min

#22

Class 12 English — Lost Spring (Practice Quiz)

10 Qs · ~10 min

#23

Class 12 English — The Last Lesson (Practice Quiz)

10 Qs · ~10 min

#24

Class 12 Psychology — Social Influence and Group Processes (Practice Quiz)

10 Qs · ~10 min

#25

Class 12 Psychology — Attitude and Social Cognition (Practice Quiz)

10 Qs · ~10 min

#26

Class 12 Psychology — Therapeutic Approaches (Practice Quiz)

10 Qs · ~10 min

#27

Class 12 Psychology — Psychological Disorders (Practice Quiz)

10 Qs · ~10 min

#28

Class 12 Psychology — Meeting Life Challenges (Practice Quiz)

10 Qs · ~10 min

#29

Class 12 Psychology — Self and Personality (Practice Quiz)

10 Qs · ~10 min

#30

Class 12 Psychology — Variations in Psychological Attributes (Practice Quiz)

10 Qs · ~10 min

#31

Class 12 Sociology — Social Movements (Practice Quiz)

10 Qs · ~10 min

#32

Class 12 Sociology — Mass Media and Communications (Practice Quiz)

10 Qs · ~10 min

#33

Class 12 Sociology — Globalisation and Social Change (Practice Quiz)

10 Qs · ~10 min

#34

Class 12 Sociology — Change and Development in Industrial Society (Practice Quiz)

10 Qs · ~10 min

#35

Class 12 Sociology — Change and Development in Rural Society (Practice Quiz)

10 Qs · ~10 min

#36

Class 12 Sociology — The Constitution and Social Change (Practice Quiz)

10 Qs · ~10 min

#37

Class 12 Sociology — Cultural Change (Practice Quiz)

10 Qs · ~10 min

#38

Class 12 Sociology — Structural Change (Practice Quiz)

10 Qs · ~10 min

#39

Class 12 Sociology — The Challenges of Cultural Diversity (Practice Quiz)

10 Qs · ~10 min

#40

Class 12 Sociology — Patterns of Social Inequality and Exclusion (Practice Quiz)

10 Qs · ~10 min

#41

Class 12 Sociology — The Market as a Social Institution (Practice Quiz)

10 Qs · ~10 min

#42

Class 12 Sociology — Social Institutions: Continuity and Change (Practice Quiz)

10 Qs · ~10 min

#43

Class 12 Sociology — The Demographic Structure of the Indian Society (Practice Quiz)

10 Qs · ~10 min

#44

Class 12 Sociology — Introducing Indian Society (Practice Quiz)

10 Qs · ~10 min

#45

Class 12 Political Science — Recent Developments in Indian Politics (Practice Quiz)

10 Qs · ~10 min

#46

Class 12 Political Science — Regional Aspirations (Practice Quiz)

10 Qs · ~10 min

#47

Class 12 Political Science — The Crisis of Democratic Order (Practice Quiz)

10 Qs · ~10 min

#48

Class 12 Political Science — Challenges to and Restoration of the Congress System (Practice Quiz)

10 Qs · ~10 min

#49

Class 12 Political Science — India's External Relations (Practice Quiz)

10 Qs · ~10 min

#50

Class 12 Political Science — Politics of Planned Development (Practice Quiz)

10 Qs · ~10 min

#51

Class 12 Political Science — Era of One-party Dominance (Practice Quiz)

10 Qs · ~10 min

#52

Class 12 Political Science — Challenges of Nation Building (Practice Quiz)

10 Qs · ~10 min

#53

Class 12 Political Science — Environment and Natural Resources (Practice Quiz)

10 Qs · ~10 min

#54

Class 12 Political Science — Security in the Contemporary World (Practice Quiz)

10 Qs · ~10 min

#55

Class 12 Political Science — International Organisations (Practice Quiz)

10 Qs · ~10 min

#56

Class 12 Political Science — Contemporary South Asia (Practice Quiz)

10 Qs · ~10 min

#57

Class 12 Political Science — Contemporary Centres of Power (Practice Quiz)

10 Qs · ~10 min

#58

Class 12 Political Science — The End of Bipolarity (Practice Quiz)

10 Qs · ~10 min

#59

Class 12 Geography — Geographical Perspective on Selected Issues and Problems (Practice Quiz)

10 Qs · ~10 min

#60

Class 12 Geography — Planning and Sustainable Development in the Indian Context (Practice Quiz)

10 Qs · ~10 min

#61

Class 12 Geography — Mineral and Energy Resources (Practice Quiz)

10 Qs · ~10 min

#62

Class 12 Geography — Water Resources (Practice Quiz)

10 Qs · ~10 min

#63

Class 12 Geography — Land Resources and Agriculture (Practice Quiz)

10 Qs · ~10 min

#64

Class 12 Geography — Human Settlements (Practice Quiz)

10 Qs · ~10 min

#65

Class 12 Geography — Population: Distribution, Density, Growth and Composition (Practice Quiz)

10 Qs · ~10 min

#66

Class 12 Geography — International Trade (India) (Practice Quiz)

10 Qs · ~10 min

#67

Class 12 Geography — Transport and Communication (India) (Practice Quiz)

10 Qs · ~10 min

#68

Class 12 Geography — Tertiary and Quaternary Activities (Practice Quiz)

10 Qs · ~10 min

#69

Class 12 Geography — Secondary Activities (Practice Quiz)

10 Qs · ~10 min

#70

Class 12 Geography — Primary Activities (Practice Quiz)

10 Qs · ~10 min

#71

Class 12 Geography — Human Development (Practice Quiz)

10 Qs · ~10 min

#72

Class 12 Geography — The World Population: Distribution, Density and Growth (Practice Quiz)

10 Qs · ~10 min

#73

Class 12 Geography — Human Geography: Nature and Scope (Practice Quiz)

10 Qs · ~10 min

#74

Class 12 History — Framing the Constitution — The Beginning of a New Era (Practice Quiz)

10 Qs · ~10 min

#75

Class 12 History — Mahatma Gandhi and the Nationalist Movement — Civil Disobedience and Beyond (Practice Quiz)

10 Qs · ~10 min

#76

Class 12 History — Rebels and the Raj — The Revolt of 1857 and its Representations (Practice Quiz)

10 Qs · ~10 min

#77

Class 12 History — Colonialism and the Countryside — Exploring Official Archives (Practice Quiz)

10 Qs · ~10 min

#78

Class 12 History — Peasants, Zamindars and the State — Agrarian Society and the Mughal Empire (c. sixteenth-seventeenth centuries) (Practice Quiz)

10 Qs · ~10 min

#79

Class 12 History — An Imperial Capital: Vijayanagara (c. fourteenth to sixteenth century) (Practice Quiz)

10 Qs · ~10 min

#80

Class 12 History — Bhakti-Sufi Traditions — Changes in Religious Beliefs and Devotional Texts (c. eighth to eighteenth century) (Practice Quiz)

10 Qs · ~10 min

#81

Class 12 History — Through the Eyes of Travellers — Perceptions of Society (c. tenth to seventeenth century) (Practice Quiz)

10 Qs · ~10 min

#82

Class 12 History — Thinkers, Beliefs and Buildings — Cultural Developments (c. 600 BCE-600 CE) (Practice Quiz)

10 Qs · ~10 min

#83

Class 12 History — Kinship, Caste and Class — Early Societies (c. 600 BCE-600 CE) (Practice Quiz)

10 Qs · ~10 min

#84

Class 12 History — Kings, Farmers and Towns — Early States and Economies (c. 600 BCE-600 CE) (Practice Quiz)

10 Qs · ~10 min

#85

Class 12 History — Bricks, Beads and Bones — The Harappan Civilisation (Practice Quiz)

10 Qs · ~10 min

#86

Class 12 Economics — Open Economy Macroeconomics (Practice Quiz)

10 Qs · ~10 min

#87

Class 12 Economics — Government Budget and the Economy (Practice Quiz)

10 Qs · ~10 min

#88

Class 12 Economics — Determination of Income and Employment (Practice Quiz)

10 Qs · ~10 min

#89

Class 12 Economics — Money and Banking (Practice Quiz)

10 Qs · ~10 min

#90

Class 12 Economics — National Income Accounting (Practice Quiz)

10 Qs · ~10 min

#91

Class 12 Economics — Market Equilibrium (Practice Quiz)

10 Qs · ~10 min

#92

Class 12 Economics — The Theory of the Firm under Perfect Competition (Practice Quiz)

10 Qs · ~10 min

#93

Class 12 Economics — Production and Costs (Practice Quiz)

10 Qs · ~10 min

#94

Class 12 Economics — Theory of Consumer Behaviour (Practice Quiz)

10 Qs · ~10 min

#95

Class 12 Economics — Introduction (Practice Quiz)

10 Qs · ~10 min

#96

Class 12 Business Studies — Consumer Protection (Practice Quiz)

10 Qs · ~10 min

#97

Class 12 Business Studies — Marketing (Practice Quiz)

10 Qs · ~10 min

#98

Class 12 Business Studies — Financial Management (Practice Quiz)

10 Qs · ~10 min

#99

Class 12 Business Studies — Controlling (Practice Quiz)

10 Qs · ~10 min

#100

Class 12 Business Studies — Directing (Practice Quiz)

10 Qs · ~10 min

#101

Class 12 Business Studies — Staffing (Practice Quiz)

10 Qs · ~10 min

#102

Class 12 Business Studies — Organising (Practice Quiz)

10 Qs · ~10 min

#103

Class 12 Business Studies — Planning (Practice Quiz)

10 Qs · ~10 min

#104

Class 12 Business Studies — Business Environment (Practice Quiz)

10 Qs · ~10 min

#105

Class 12 Business Studies — Nature and Significance of Management (Practice Quiz)

10 Qs · ~10 min

#106

Class 12 Accountancy — Cash Flow Statement (Practice Quiz)

10 Qs · ~10 min

#107

Class 12 Accountancy — Accounting Ratios (Practice Quiz)

10 Qs · ~10 min

#108

Class 12 Accountancy — Analysis of Financial Statements (Practice Quiz)

10 Qs · ~10 min

#109

Class 12 Accountancy — Financial Statements of a Company (Practice Quiz)

10 Qs · ~10 min

#110

Class 12 Accountancy — Issue and Redemption of Debentures (Practice Quiz)

10 Qs · ~10 min

#111

Class 12 Accountancy — Accounting for Share Capital (Practice Quiz)

10 Qs · ~10 min

#112

Class 12 Accountancy — Dissolution of Partnership Firm (Practice Quiz)

10 Qs · ~10 min

#113

Class 12 Accountancy — Reconstitution of a Partnership Firm – Retirement/Death of a Partner (Practice Quiz)

10 Qs · ~10 min

#114

Class 12 Accountancy — Reconstitution of a Partnership Firm – Admission of a Partner (Practice Quiz)

10 Qs · ~10 min

#115

Class 12 Accountancy — Accounting for Partnership: Basic Concepts (Practice Quiz)

10 Qs · ~10 min

#116

Class 12 Maths — Probability (Practice Quiz)

10 Qs · ~10 min

#117

Class 12 Maths — Linear Programming (Practice Quiz)

10 Qs · ~10 min

#118

Class 12 Maths — Three Dimensional Geometry (Practice Quiz)

10 Qs · ~10 min

#119

Class 12 Maths — Vector Algebra (Practice Quiz)

10 Qs · ~10 min

#120

Class 12 Maths — Differential Equations (Practice Quiz)

10 Qs · ~10 min

#121

Class 12 Maths — Application of Integrals (Practice Quiz)

10 Qs · ~10 min

#122

Class 12 Maths — Integrals (Practice Quiz)

10 Qs · ~10 min

#123

Class 12 Maths — Application of Derivatives (Practice Quiz)

10 Qs · ~10 min

#124

Class 12 Maths — Continuity and Differentiability (Practice Quiz)

10 Qs · ~10 min

#125

Class 12 Maths — Determinants (Practice Quiz)

10 Qs · ~10 min

#126

Class 12 Maths — Matrices (Practice Quiz)

10 Qs · ~10 min

#127

Class 12 Maths — Inverse Trigonometric Functions (Practice Quiz)

10 Qs · ~10 min

#128

Class 12 Maths — Relations and Functions (Practice Quiz)

10 Qs · ~10 min

#129

Class 12 Biology — Biodiversity and its Conservation (Practice Quiz)

10 Qs · ~10 min

#130

Class 12 Biology — Ecosystem (Practice Quiz)

10 Qs · ~10 min

#131

Class 12 Biology — Organisms and Populations (Practice Quiz)

10 Qs · ~10 min

#132

Class 12 Biology — Biotechnology and its Applications (Practice Quiz)

10 Qs · ~10 min

#133

Class 12 Biology — Biotechnology: Principles and Processes (Practice Quiz)

10 Qs · ~10 min

#134

Class 12 Biology — Microbes in Human Welfare (Practice Quiz)

10 Qs · ~10 min

#135

Class 12 Biology — Human Health and Disease (Practice Quiz)

10 Qs · ~10 min

#136

Class 12 Biology — Evolution (Practice Quiz)

10 Qs · ~10 min

#137

Class 12 Biology — Molecular Basis of Inheritance (Practice Quiz)

10 Qs · ~10 min

#138

Class 12 Biology — Principles of Inheritance and Variation (Practice Quiz)

10 Qs · ~10 min

#139

Class 12 Biology — Reproductive Health (Practice Quiz)

10 Qs · ~10 min

#140

Class 12 Biology — Human Reproduction (Practice Quiz)

10 Qs · ~10 min

#141

Class 12 Biology — Sexual Reproduction in Flowering Plants (Practice Quiz)

10 Qs · ~10 min

#142

Class 12 Chemistry — Biomolecules (Practice Quiz)

10 Qs · ~10 min

#143

Class 12 Chemistry — Amines (Practice Quiz)

10 Qs · ~10 min

#144

Class 12 Chemistry — Aldehydes, Ketones and Carboxylic Acids (Practice Quiz)

10 Qs · ~10 min

#145

Class 12 Chemistry — Alcohols, Phenols and Ethers (Practice Quiz)

10 Qs · ~10 min

#146

Class 12 Chemistry — Haloalkanes and Haloarenes (Practice Quiz)

10 Qs · ~10 min

#147

Class 12 Chemistry — Coordination Compounds (Practice Quiz)

10 Qs · ~10 min

#148

Class 12 Chemistry — The d- and f-Block Elements (Practice Quiz)

10 Qs · ~10 min

#149

Class 12 Chemistry — Chemical Kinetics (Practice Quiz)

10 Qs · ~10 min

#150

Class 12 Chemistry — Electrochemistry (Practice Quiz)

10 Qs · ~10 min

#151

Class 12 Chemistry — Solutions (Practice Quiz)

10 Qs · ~10 min

#152

Class 12 Physics — Semiconductor Electronics: Materials, Devices and Simple Circuits (Practice Quiz)

10 Qs · ~10 min

#153

Class 12 Physics — Nuclei (Practice Quiz)

10 Qs · ~10 min

#154

Class 12 Physics — Atoms (Practice Quiz)

10 Qs · ~10 min

#155

Class 12 Physics — Dual Nature of Radiation and Matter (Practice Quiz)

10 Qs · ~10 min

#156

Class 12 Physics — Wave Optics (Practice Quiz)

10 Qs · ~10 min

#157

Class 12 Physics — Ray Optics and Optical Instruments (Practice Quiz)

10 Qs · ~10 min

#158

Class 12 Physics — Electromagnetic Waves (Practice Quiz)

10 Qs · ~10 min

#159

Class 12 Physics — Alternating Current (Practice Quiz)

10 Qs · ~10 min

#160

Class 12 Physics — Electromagnetic Induction (Practice Quiz)

10 Qs · ~10 min

#161

Class 12 Physics — Magnetism and Matter (Practice Quiz)

10 Qs · ~10 min

#162

Class 12 Physics — Moving Charges and Magnetism (Practice Quiz)

10 Qs · ~10 min

#163

Class 12 Physics — Electrostatic Potential and Capacitance (Practice Quiz)

10 Qs · ~10 min

#164

Class 12 Physics — Electric Charges and Fields (Practice Quiz)

10 Qs · ~10 min

#165

Class 12 Business Studies — Principles of Management (Practice Quiz)

10 Qs · ~10 min

#166

CBSE Class 12 — Genetics and Evolution (Practice Quiz)

10 Qs · ~10 min

#167

CBSE Class 12 — Matrices and Determinants (Practice Quiz)

10 Qs · ~10 min

#168

CBSE Class 12 — Solutions and Colligative Properties (Practice Quiz)

10 Qs · ~10 min

#169

Class 12 Physics — Current Electricity (Practice Quiz)

10 Qs · ~10 min

#170

CBSE Class 12 — Electrostatics and Electric Field (Practice Quiz)

10 Qs · ~10 min

#171

Humanities Subjects Practice Quiz | CBSE Class 12 Board Examination

10 Qs · ~10 min

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