An environmental change that leads to the production of less than the expected amount of cyclin would tend to _______ the activity of the Cdk.This would lead to _______ phosphorylation of the target protein, which in turn would lead to _______ cells being stopped at the checkpoint.
A) increase; increased; more
B) increase; decreased; fewer
C) increase: increased; fewer
D) decrease; increased; fewer
E) decrease; decreased; more

Question

Quizplus · Accepted Answer

Cyclin binds to and activates Cdk (cyclin-dependent kinase), which then phosphorylates target proteins to promote cell cycle progression. Less cyclin means less Cdk activity, leading to decreased phosphorylation of target proteins. This results in more cells being stopped at the checkpoint, as they cannot proceed to the next phase of the cell cycle without proper phosphorylation signals.

An Environmental Change That Leads to the Production of Less