[Unit 3.8] | The Cell Cycle

Question 1

What are the 3 stages of the Cell cycle?

Answer 1

• Interphase:
» Occupies most of the cycle.
» Intermission / resting period.

• Nuclear Division: Mitosis/Meiosis

• Cytokinesis: Division of the cytoplasm

Question 2

What 3 stages does interphase consist of?

Answer 2

• G1: Growth & signal to divide.

• S: Synthesis of new DNA.

• G2: Further growth & error checking of new DNA.

Question 3

How can cancer be treated using the cell cycle?

Answer 3

• Targetting S-Phase to prevent further growth of tumours.

• Inhibiting metaphase by preventing the spindle formation.

Question 4

How do tumour cells form?

Answer 4

• Genes that regulate the cell cycle become damaged and therefore cell division is uncontrolled.