A group of cells is assayed for DNA content immediately following mitosis and is found to have an average of 8 picograms of DNA per nucleus. How many picograms would be found at the end of S and the end of G2?
A) 8; 8
B) 8; 16
C) 16; 8
D) 16; 16
E) 12; 16

Question

Quizplus · Accepted Answer

At the end of S phase, the amount of DNA would double to 16 picograms because the DNA undergoes replication during S phase. At the end of G2 phase, the DNA content remains at 16 picograms as there is no net increase of DNA content during this phase. Therefore, the correct answer is D) 16; 16.

A Group of Cells Is Assayed for DNA Content Immediately