ICMR Practice Quiz

Question 1

Which organelle is primarily responsible for ATP production through oxidative phosphorylation in eukaryotic cells?

Accepted Answer

Mitochondrion

Question 2

Ribosomes attached to the rough endoplasmic reticulum mainly synthesize proteins that are destined for which location?

Accepted Answer

Secretion, membranes, or lysosomes

Question 3

A researcher isolates an organelle with a double membrane, 70S ribosomes, and circular DNA. Which conclusion is most strongly supported?

Accepted Answer

It supports the endosymbiotic origin of mitochondria or chloroplasts

Question 4

Which event would be most immediately impaired if the nucleolus were selectively destroyed while the rest of the nucleus remained intact?

Accepted Answer

Assembly of ribosomal subunits

Question 5

Which statement correctly distinguishes smooth endoplasmic reticulum from rough endoplasmic reticulum?

Accepted Answer

Smooth ER is mainly involved in lipid synthesis and detoxification, whereas rough ER is associated with protein synthesis

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