Question

this is a model of the cell cycle. in which phase does the dna double?
a. g1
b. g2
c. s
d. m

Explanation:

In the cell - cycle, DNA replication (doubling) occurs during the S (synthesis) phase. G1 is the first gap phase for cell growth and preparation for DNA synthesis. G2 is the second gap phase for further growth and preparation for mitosis. M is the mitosis phase where the cell divides.

Answer:

C. S