The Cell Cycle

Question 1

What are the three stages of the cell cycle?

Answer 1

1. Interphase: Known as the resting phase and occupies most of the cell cycle.
2. Nuclear Divison: When the nucleus divides int two or four.
3. Division of the Cytoplasm (Cytokinesis): Follows nuclear divison and is the process by which the cytoplasm splits to form two or four new cells.

Question 2

What occurs during interphase?

Answer 2

DNA is replicated, ATP content is increased, Resting otherwise.

Question 3

How is mitosis controlled?

Answer 3

Mitosis is controlled by two types of gene.

Question 4

How do cancer and its treatment relate to the cell cycle?

Answer 4

The treatment of cancer often involves killing dividing cells by blocking a part of the cell cycle. Drugs used usually disrupt the cell cycle by:
-Preventing DNA from replicating
-Inhibiting the metaphase stage of mitosis by interfering with spindle formation

The problem with this is that they can disrupt the cell cycle of normal cells.