A group of cells is tested for DNA content immediately following mitosis and is found to have an average of 8 picograms of DNA per nucleus. Based on this information, how many pictograms of DNA would you expect to find at the end of the S phase and the end of the G2 phase?

At the end of S phase: 16

At the end of G2 phase: 16

Explanation:

The cells formed by the end of mitosis had 8 picograms of DNA. These cells entered in the process of the cell cycle. The G1 phase of interphase would duplicate their cellular content. S phase of interphase would include DNA replication. During this phase, the content of DNA in the nuclei of these cells would be doubled. By the end of the S phase, there would be 16 picograms of DNA in nuclei of each of these cells.

These cells would enter the G2 phase where the DNA content is maintained. Therefore, by the end of the G2 phase, each of these cells would have 16 picograms of DNA.

answer: accepted answer: aquatic animals use the oxygen dissolved in water to carry out respiration. since the amount of dissolved oxygen in water is low as compared to the amount of oxygen in the air, therefore the rate of breathing in aquatic animals is much faster than it is in terrestrial animals.

explanation:

a. to encourage apoptosis