Question

What is a function of cyclins?

A. Cyclins are carbohydrates that regulate DNA replication during the mitosis phase of the cell cycle.
B. Cyclins are glycoproteins that repair DNA in the beginning of cell cycle.
C. Cyclins are proteins that regulate when and how often a cell divides

Answer 1

Cyclins are proteins, (so they are not carbohydrates - we in any case reject option A) that regulate the cell cycle - that is the division of the cell. The correct answer is c! Specifically, they active cyclin- dependent kinase enzymes.

Examples of cyclins are cyclyn A and Cyclyn D