2
AssignmentMultiple Choice

Cell Growth and Organization

Question 2 • Health Science Concepts A1 – EDGNTY-83861 26-27

G1 cyclins are responsible for

Answer
A
destroying mitotic cyclins.
B
activating CdKs.
C
controlling the G2 phase.
D
signaling mitosis.

Explanation

G1 cyclins bind to and activate cyclin-dependent kinases (CdKs), helping the cell progress through the G1 phase and toward DNA replication. They do not destroy mitotic cyclins or control the G2 phase. Therefore, the correct choice is activating CdKs.

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