Hass of DNA During the Cell Cycie

Question

Hass of D
Stages
The cells have completed mitosis and cytokinesis without replicating their DNA.
Scientists determined the total mass of DNA from a sample of animal cells. The masses of equal numbers of cells were taken during three different stages of the cell cycle. Stage I contains cells massed during G1 of the cell cycle. Which statement best describes the cells during Stage II?
The cells have temporarily exited the cell cycle without replicating their DNA.
The cells have replicated their DNA and completed mitosis and cytokinesis.
The cells have replicated their DNA, but have not completed mitosis and cytokinesis.

Answer 1

In the context of the cell cycle, Stage I corresponds to the G1 phase, where the cells are preparing for DNA replication but have not yet replicated their DNA.

Stage II is typically where DNA replication occurs, which takes place during the S phase of the cell cycle. After this stage, cells will advance to G2 and then enter mitosis (M phase) followed by cytokinesis.

Given the options presented for Stage II, the best description would be:

The cells have replicated their DNA, but have not completed mitosis and cytokinesis.

This indicates that the cells are in the S phase of the cell cycle where DNA replication occurs prior to the cell entering mitosis.