You have isolated a strain of mutant yeast cells that divides normally at 30°C but cannot enter M phase at 37°C.You have isolated its mitotic cyclin and mitotic Cdk and find that both proteins are produced and can form a normal M-Cdk complex at both temperatures.Which of the following temperature-sensitive mutations could NOT be responsible for the behavior of this strain of yeast?

Question

Quizplus · Accepted Answer

The inactivation of an enzyme that ubiquitylates M cyclin would prevent the degradation of M cyclin, potentially leading to an accumulation of M-Cdk complex, which would not explain the inability to enter M phase at 37°C.

You Have Isolated a Strain of Mutant Yeast Cells That