Cell Cycle and Cell Division
Class 11 Biology · Biology · Chapter 10
CBSE Class 11 community
View all
Physics, Chemistry, Maths + English
7~140days leftAnnual exams · school dates varyFeb–Mar 2027 · school-specific · tentative
Every subject, one purchase- Mathematics
- Physics
- + 3 more
Physics, Chemistry, Biology + English
~140days leftAnnual exams · school dates varyFeb–Mar 2027 · school-specific · tentative
Every subject, one purchase- Physics
- Chemistry
- + 3 more
Accountancy, Business Studies, Economics + English
7~140days leftAnnual exams · school dates varyFeb–Mar 2027 · school-specific · tentative
Every subject, one purchase- Accountancy
- Business Studies
- + 3 more
Biology
~140days leftAnnual exams · school dates varyFeb–Mar 2027 · school-specific · tentative
Revise all of it in about an hour- Space weighted by unit marks
- Charts from the book's own data
- Traps corrected
Accountancy
~140days leftAnnual exams · school dates varyFeb–Mar 2027 · school-specific · tentative
All 2 books, one purchase- Accountancy
Hindi Elective
2~140days leftAnnual exams · school dates varyFeb–Mar 2027 · school-specific · tentative
All 2 books, one purchase- हिंदी
Hindi Core
2~140days leftAnnual exams · school dates varyFeb–Mar 2027 · school-specific · tentative
All 2 books, one purchase- हिंदी
Chemistry
2~140days leftAnnual exams · school dates varyFeb–Mar 2027 · school-specific · tentative
All 2 books, one purchase- Chemistry
Political Science
2~140days leftAnnual exams · school dates varyFeb–Mar 2027 · school-specific · tentative
All 2 books, one purchase- Political Science
Urdu Elective
2~140days leftAnnual exams · school dates varyFeb–Mar 2027 · school-specific · tentative
All 2 books, one purchase- اردو
- Urdu Elective
Hindustani Music (Vocal / Melodic)
2~140days leftAnnual exams · school dates varyFeb–Mar 2027 · school-specific · tentative
All 2 books, one purchase- हिंदुस्तानी संगीत
Home Science
2~140days leftAnnual exams · school dates varyFeb–Mar 2027 · school-specific · tentative
All 2 books, one purchase- Home Science
English Core
2~140days leftAnnual exams · school dates varyFeb–Mar 2027 · school-specific · tentative
All 2 books, one purchase- Hornbill
- Snapshots
Geography
3~140days leftAnnual exams · school dates varyFeb–Mar 2027 · school-specific · tentative
All 3 books, one purchase- Geography
Sociology
2~140days leftAnnual exams · school dates varyFeb–Mar 2027 · school-specific · tentative
All 2 books, one purchase- Sociology
Economics
2~140days leftAnnual exams · school dates varyFeb–Mar 2027 · school-specific · tentative
All 2 books, one purchase- Economics
Physics
~140days leftAnnual exams · school dates varyFeb–Mar 2027 · school-specific · tentative
All 2 books, one purchase- Physics
Mathematics
~140days leftAnnual exams · school dates varyFeb–Mar 2027 · school-specific · tentative
TrendingRevise all of it in about an hour- Space weighted by unit marks
- Charts from the book's own data
- Traps corrected
Physics
~140days leftAnnual exams · school dates varyFeb–Mar 2027 · school-specific · tentative
Revise all of it in about an hour- Space weighted by unit marks
- Charts from the book's own data
- Traps corrected
Physics
~140days leftAnnual exams · school dates varyFeb–Mar 2027 · school-specific · tentative
Revise all of it in about an hour- Space weighted by unit marks
- Charts from the book's own data
- Traps corrected
Chemistry
~140days leftAnnual exams · school dates varyFeb–Mar 2027 · school-specific · tentative
Revise all of it in about an hour- Space weighted by unit marks
- Charts from the book's own data
- Traps corrected
Chemistry
~140days leftAnnual exams · school dates varyFeb–Mar 2027 · school-specific · tentative
Revise all of it in about an hour- Space weighted by unit marks
- Charts from the book's own data
- Traps corrected
Accountancy
~140days leftAnnual exams · school dates varyFeb–Mar 2027 · school-specific · tentative
TrendingRevise all of it in about an hour- Space weighted by unit marks
- Charts from the book's own data
- Traps corrected
Accountancy
~140days leftAnnual exams · school dates varyFeb–Mar 2027 · school-specific · tentative
Revise all of it in about an hour- Space weighted by unit marks
- Charts from the book's own data
- Traps corrected
Business Studies
~140days leftAnnual exams · school dates varyFeb–Mar 2027 · school-specific · tentative
Revise all of it in about an hour- Space weighted by unit marks
- Charts from the book's own data
- Traps corrected
Economics
~140days leftAnnual exams · school dates varyFeb–Mar 2027 · school-specific · tentative
Revise all of it in about an hour- Space weighted by unit marks
- Charts from the book's own data
- Traps corrected
Economics
~140days leftAnnual exams · school dates varyFeb–Mar 2027 · school-specific · tentative
Revise all of it in about an hour- Space weighted by unit marks
- Charts from the book's own data
- Traps corrected
History
~140days leftAnnual exams · school dates varyFeb–Mar 2027 · school-specific · tentative
Revise all of it in about an hour- Space weighted by unit marks
- Charts from the book's own data
- Traps corrected
Geography
~140days leftAnnual exams · school dates varyFeb–Mar 2027 · school-specific · tentative
Revise all of it in about an hour- Space weighted by unit marks
- Charts from the book's own data
- Traps corrected
Geography
~140days leftAnnual exams · school dates varyFeb–Mar 2027 · school-specific · tentative
Revise all of it in about an hour- Space weighted by unit marks
- Charts from the book's own data
- Traps corrected
Geography
~140days leftAnnual exams · school dates varyFeb–Mar 2027 · school-specific · tentative
Revise all of it in about an hour- Space weighted by unit marks
- Charts from the book's own data
- Traps corrected
Political Science
~140days leftAnnual exams · school dates varyFeb–Mar 2027 · school-specific · tentative
Revise all of it in about an hour- Space weighted by unit marks
- Charts from the book's own data
- Traps corrected
Political Science
~140days leftAnnual exams · school dates varyFeb–Mar 2027 · school-specific · tentative
Revise all of it in about an hour- Space weighted by unit marks
- Charts from the book's own data
- Traps corrected
Sociology
~140days leftAnnual exams · school dates varyFeb–Mar 2027 · school-specific · tentative
Revise all of it in about an hour- Space weighted by unit marks
- Charts from the book's own data
- Traps corrected
Sociology
~140days leftAnnual exams · school dates varyFeb–Mar 2027 · school-specific · tentative
Revise all of it in about an hour- Space weighted by unit marks
- Charts from the book's own data
- Traps corrected
Psychology
~140days leftAnnual exams · school dates varyFeb–Mar 2027 · school-specific · tentative
Revise all of it in about an hour- Space weighted by unit marks
- Charts from the book's own data
- Traps corrected
English Core · Hornbill
~140days leftAnnual exams · school dates varyFeb–Mar 2027 · school-specific · tentative
Revise all of it in about an hour- Space weighted by unit marks
- Charts from the book's own data
- Traps corrected
English Core · Snapshots
~140days leftAnnual exams · school dates varyFeb–Mar 2027 · school-specific · tentative
Revise all of it in about an hour- Space weighted by unit marks
- Charts from the book's own data
- Traps corrected
English Elective · Woven Words
~140days leftAnnual exams · school dates varyFeb–Mar 2027 · school-specific · tentative
Revise all of it in about an hour- Space weighted by unit marks
- Charts from the book's own data
- Traps corrected
हिंदी (आधार)
~140days leftAnnual exams · school dates varyFeb–Mar 2027 · school-specific · tentative
Revise all of it in about an hour- Space weighted by unit marks
- Charts from the book's own data
- Traps corrected
हिंदी (आधार)
~140days leftAnnual exams · school dates varyFeb–Mar 2027 · school-specific · tentative
Revise all of it in about an hour- Space weighted by unit marks
- Charts from the book's own data
- Traps corrected
हिंदी (ऐच्छिक)
~140days leftAnnual exams · school dates varyFeb–Mar 2027 · school-specific · tentative
Revise all of it in about an hour- Space weighted by unit marks
- Charts from the book's own data
- Traps corrected
हिंदी (ऐच्छिक)
~140days leftAnnual exams · school dates varyFeb–Mar 2027 · school-specific · tentative
Revise all of it in about an hour- Space weighted by unit marks
- Charts from the book's own data
- Traps corrected
संस्कृतम् (केन्द्रिकम्)
~140days leftAnnual exams · school dates varyFeb–Mar 2027 · school-specific · tentative
Revise all of it in about an hour- Space weighted by unit marks
- Charts from the book's own data
- Traps corrected
संस्कृत (ऐच्छिक)
~140days leftAnnual exams · school dates varyFeb–Mar 2027 · school-specific · tentative
Revise all of it in about an hour- Space weighted by unit marks
- Charts from the book's own data
- Traps corrected
اردو (کور)
~140days leftAnnual exams · school dates varyFeb–Mar 2027 · school-specific · tentative
Revise all of it in about an hour- Space weighted by unit marks
- Charts from the book's own data
- Traps corrected
اردو (اختیاری)
~140days leftAnnual exams · school dates varyFeb–Mar 2027 · school-specific · tentative
Revise all of it in about an hour- Space weighted by unit marks
- Charts from the book's own data
- Traps corrected
Urdu Elective
~140days leftAnnual exams · school dates varyFeb–Mar 2027 · school-specific · tentative
Revise all of it in about an hour- Space weighted by unit marks
- Charts from the book's own data
- Traps corrected
Computer Science
~140days leftAnnual exams · school dates varyFeb–Mar 2027 · school-specific · tentative
Revise all of it in about an hour- Space weighted by unit marks
- Charts from the book's own data
- Traps corrected
Informatics Practices
~140days leftAnnual exams · school dates varyFeb–Mar 2027 · school-specific · tentative
TrendingRevise all of it in about an hour- Space weighted by unit marks
- Charts from the book's own data
- Traps corrected
Home Science
~140days leftAnnual exams · school dates varyFeb–Mar 2027 · school-specific · tentative
Revise all of it in about an hour- Space weighted by unit marks
- Charts from the book's own data
- Traps corrected
Home Science
~140days leftAnnual exams · school dates varyFeb–Mar 2027 · school-specific · tentative
Revise all of it in about an hour- Space weighted by unit marks
- Charts from the book's own data
- Traps corrected
Fine Art · Painting
~140days leftAnnual exams · school dates varyFeb–Mar 2027 · school-specific · tentative
Revise all of it in about an hour- Space weighted by unit marks
- Charts from the book's own data
- Traps corrected
Biotechnology
~140days leftAnnual exams · school dates varyFeb–Mar 2027 · school-specific · tentative
Revise all of it in about an hour- Space weighted by unit marks
- Charts from the book's own data
- Traps corrected
Knowledge Traditions
~140days leftAnnual exams · school dates varyFeb–Mar 2027 · school-specific · tentative
Revise all of it in about an hour- Space weighted by unit marks
- Charts from the book's own data
- Traps corrected
सृजनात्मक लेखन और अनुवाद
~140days leftAnnual exams · school dates varyFeb–Mar 2027 · school-specific · tentative
Revise all of it in about an hour- Space weighted by unit marks
- Charts from the book's own data
- Traps corrected
Health and Physical Education
~140days leftAnnual exams · school dates varyFeb–Mar 2027 · school-specific · tentative
Revise all of it in about an hour- Space weighted by unit marks
- Charts from the book's own data
- Traps corrected
हिंदुस्तानी संगीत (गायन / वादन)
~140days leftAnnual exams · school dates varyFeb–Mar 2027 · school-specific · tentative
Revise all of it in about an hour- Space weighted by unit marks
- Charts from the book's own data
- Traps corrected
हिंदुस्तानी संगीत (गायन / वादन)
~140days leftAnnual exams · school dates varyFeb–Mar 2027 · school-specific · tentative
Revise all of it in about an hour- Space weighted by unit marks
- Charts from the book's own data
- Traps corrected
हिंदुस्तानी संगीत (तबला / पखावज)
~140days leftAnnual exams · school dates varyFeb–Mar 2027 · school-specific · tentative
Revise all of it in about an hour- Space weighted by unit marks
- Charts from the book's own data
- Traps corrected
Summary
This chapter explains how cells reproduce through the cell cycle and the two kinds of division, mitosis and meiosis. The cell cycle is the orderly sequence by which a cell duplicates its genome, synthesises other constituents and divides; in a typical human cell it lasts about 24 hours. It has two basic phases: interphase, which occupies over 95 per cent of the cycle and is subdivided into G1 (growth without DNA replication), S (DNA replication, when DNA content doubles though chromosome number stays the same) and G2 (preparation for mitosis), and the M phase (mitosis). Cells that stop dividing enter a quiescent G0 stage. Mitosis, the equational division, keeps the chromosome number constant and proceeds through prophase (chromosome condensation, spindle formation), metaphase (chromosomes align on the metaphase plate), anaphase (centromeres split and chromatids move to poles) and telophase (nuclei reform), followed by cytokinesis (a furrow in animal cells, a cell plate in plant cells). Meiosis, the reductional division, occurs in diploid cells that form gametes; it has two divisions but one round of DNA replication. Meiosis I includes a long prophase I (leptotene, zygotene, pachytene with crossing over, diplotene and diakinesis), and meiosis II resembles mitosis, yielding four haploid cells. Mitosis enables growth and repair; meiosis conserves chromosome number across generations and generates variation.
Phases of the cell cycle: G1, S, G2M phase and the quiescent G0 stageMitosis: prophase to telophaseCytokinesis and significance of mitosisMeiosis I and prophase I sub-stagesMeiosis II and significance of meiosis
Key terms
Cell cycle
The sequence of events by which a cell duplicates its genome and divides into two daughter cells.
Interphase
The phase between two M phases, comprising G1, S and G2, during which the cell grows and replicates its DNA.
Mitosis
The equational division of a cell into two daughter cells with the same chromosome number as the parent.
Meiosis
The reductional division that halves the chromosome number and produces four haploid cells.
Crossing over
The exchange of genetic material between non-sister chromatids of homologous chromosomes during pachytene.
Cytokinesis
The division of the cytoplasm following nuclear division, completing cell division.
Extra questions & answers
Try one from this chapter
DNA replication during the cell cycle takes place in the: