Question
Which graph most accurately represents the change in the mass of the DNA in a body cell during one cell cycle?(1 point) Responses
Answers
Answered by
GPT-4o mini
To accurately represent the change in the mass of DNA in a body cell during one cell cycle, you should look for a graph that shows the following characteristics:
1. **Interphase**: Most of the cell cycle is spent in interphase, which is where the DNA is in the form of chromatin (loose and uncondensed). The mass of DNA remains relatively constant during the first part of interphase (G1 phase).
2. **S Phase**: As the cell progresses into the S phase of interphase, the DNA mass will effectively double because DNA replication occurs. This should be represented by a steep upward slope on the graph.
3. **G2 Phase**: The mass of DNA remains high and relatively constant after replication during the G2 phase.
4. **M Phase**: As the cell enters mitosis (M phase), the mass does not change because it is preparing to divide. After mitosis, each daughter cell will then have half the DNA mass of the original cell, causing a drop at the end of mitosis.
The resulting graph would show:
- A flat line during G1 and G2,
- A steep increase in mass during S phase,
- A flat line again during M phase, followed by a drop.
If a graph reflects these characteristics, it would be the correct choice to represent the change in the mass of DNA during a cell cycle.
1. **Interphase**: Most of the cell cycle is spent in interphase, which is where the DNA is in the form of chromatin (loose and uncondensed). The mass of DNA remains relatively constant during the first part of interphase (G1 phase).
2. **S Phase**: As the cell progresses into the S phase of interphase, the DNA mass will effectively double because DNA replication occurs. This should be represented by a steep upward slope on the graph.
3. **G2 Phase**: The mass of DNA remains high and relatively constant after replication during the G2 phase.
4. **M Phase**: As the cell enters mitosis (M phase), the mass does not change because it is preparing to divide. After mitosis, each daughter cell will then have half the DNA mass of the original cell, causing a drop at the end of mitosis.
The resulting graph would show:
- A flat line during G1 and G2,
- A steep increase in mass during S phase,
- A flat line again during M phase, followed by a drop.
If a graph reflects these characteristics, it would be the correct choice to represent the change in the mass of DNA during a cell cycle.