Question

the dna content of a cell is determined immediately following mitosis and cytokinesis and is found to have 8 picograms of dna per in its nucleus. how many picograms of dna would be found in that cells nucleus at the end of the following s phase? at the end of the following g2 phase?
o 16; 16
o 8; 8
o 8; 16
o 16; 8
o 12; 16

Explanation:

Step1: Recall DNA replication in cell cycle

After mitosis and cytokinesis, cell enters G1 phase. In S - phase, DNA replicates.

Step2: Determine DNA amount after S - phase

If initial DNA amount is 8 picograms, after S - phase it doubles to 16 picograms as DNA replicates.

Step3: Determine DNA amount after G2 - phase

There is no additional DNA synthesis in G2 - phase. So DNA amount remains 16 picograms.

Answer:

16; 16