Question

The role of wee1 is to:

a. Activate MPF by phosphorylating the kinase subunit
b. Activate MPF by phosphorylating the cyclin subunit
c. Inactivate MPF by phosphorylating the kinase subunit
d. Inactivate MPF by phosphorylating the cyclin subunit
e. None of the above

Answer 1

The role of wee1 is to inactivate MPF by phosphorylating the kinase subunit.

Step-by-step explanation:

The role of wee1 is to: c. Inactivate MPF by phosphorylating the kinase subunit.

Wee1 is a protein kinase that plays a critical role in regulating the cell cycle. It acts as a negative regulator of the MPF (Mitosis Promoting Factor) complex by phosphorylating the kinase subunit, which leads to the inactivation of MPF. When MPF is inactive, it prevents the progression of the cell cycle to mitosis.

By phosphorylating the kinase subunit of MPF, wee1 helps to control the timing of cell division and ensures proper cell cycle progression.