Question

In a sample of cells, the DNA content immediately following mitosis is measured and is equal to 10 picograms of DNA per nucleus. How much DNA would be found in each nucleus at the end of S and the end of G2?

Answer 1

Answer:

1. At the end of S phase- 20 pg DNA

2. At the end of G2 phase-  20 Pg DNA

Explanation:

The cell before undergoing M phase undergoes the steps of interphase that is G₁, S and G₂ phase.

During S phase, the process of cell replication takes place which replicates the DNA as a result of which the amount of DNA doubles. This DNA amount is reduced to half during the anaphase stage of M phase.

In the question since the amount of DNA is 10pg therefore the amount will be double during S phase and becomes 20 pg and will remain 20 pg until the DNA is distributed therefore at the end of G₂ phase Will remain the 20 pg.