The phase of the cell cycle associated with the doubling of

The phase of the cell cycle associated with the doubling of the amount of DNA the cell is 1)G0. 2) G1. 3) G2. 4)M. 5)S. Ras is to Raf, as MEK is to 1) Ras. 2) tyrosine. 3) MAPK. 4) Cdc. 5) cell growth.

Solution

Answer:

9. (5) S

During the S-phase of the cell cycle, the amount of DNA in a cell gets doubles.

10. (3) MAPK

Activated Ras activates the protein kinase activity of RAF kinase.

RAF kinase phosphorylates and activates MEK (MEK1 and MEK2).

MEK phosphorylates and activates a mitogen-activated protein kinase (MAPK).