Question

explain what happens if a cell - cycle checkpoint fails. what can this lead to in the body?
describe one way that cancer cells are different from normal, healthy cells.
why do cells need to divide instead of just growing larger and larger?
give one example of how lifestyle choices can reduce cancer risk and explain why.
imagine you are explaining cancer to a younger student. write 3 - 4 sentences that describe how cancer is related to the cell cycle, using simple language.

Explanation:

1. If a cell - cycle checkpoint fails, damaged or abnormal cells may continue to divide. This can lead to the accumulation of mutations and potentially the development of tumors, which can be harmful to the body.
2. Cancer cells often divide uncontrollably. Unlike normal cells that follow a regulated cell - cycle and stop dividing when needed, cancer cells keep dividing without proper regulation.
3. Cells need to divide instead of just growing larger because as a cell grows, its surface - area - to - volume ratio decreases. This makes it difficult for the cell to efficiently exchange nutrients and waste. Division helps maintain an optimal surface - area - to - volume ratio.
4. One lifestyle choice to reduce cancer risk is not smoking. Smoking exposes the body to harmful chemicals that can damage DNA in cells. By not smoking, the risk of DNA mutations that can lead to cancer is decreased.
5. Cancer is related to the cell cycle like this: The cell cycle is the process by which cells grow and divide. In cancer, something goes wrong with the cell - cycle. Cells start dividing too much and too fast, and these out - of - control cells can form tumors.

Answer:

1. Damaged cells may keep dividing, leading to tumors.
2. Cancer cells divide uncontrollably.
3. To maintain a good surface - area - to - volume ratio.
4. Not smoking; reduces DNA damage from chemicals.
5. Something goes wrong with the cell cycle, cells divide too fast and form tumors.