cell divisions

| December 8, 2015

Regulation of the cell cycle is dependent upon cyclins and cyclin-dependent kinases. The key(s) that allows a cell to progress beyond the restriction point is (are)

a. cdk1 and cyclin B.

b. cyclin D and p21.

c. cyclin A and Cdk2.

d. phosphorylation of RB by Cdk4 and Cdk2

e. external signals from growth factors.

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Category: Biology

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