Question

The image given below is the ultrastructure of an animal cell.
What role does structure A play in mitosis?

• A. It helps in DNA replication
• B. It helps in cytokinesis
• C. It helps to separate sister chromatids
• D. It helps to dissolve nuclear envelope

Answer 1

The correct option is C It helps to separate sister chromatids

The structure labelled as A in diagram are centrioles. They are organelles found in animal cells and lie close to the nucleus. Centrioles play an important role in cell division. The spindle fibres arise from centrioles. The spindle fibres are composed of microtubules. The spindle fibres attach to chromosomes and help in pulling the chromatids apart that results in separation of the sister chromatids.