L25 Cell cycle

Question 1

What three critical events does the cell cycle makes sure happens?

Answer 1

1. Chromosome replication
2. Chromosoem segregation
3. Cell division.

Question 2

How are normal cells stimulated to proliferate?

Answer 2

By extrinsic factors.

Question 3

How can a proliferation be forced to halt?

Answer 3

Overule of stimulatory factors by extracellular signals

Question 4

What is the structure of the cell cycle?

Answer 4

1. G1
2. S Phase.
3. G2
4. Mitosis Phase.

Question 5

What happens in G1 phase?

Answer 5

1. Cell increases in size
2. ribosomes and RNA produced
3. Preparation for DNA synthesis.

Question 6

What happens in S phase?

Answer 6

DNA is synthesised

Question 7

What happens in G2 phase?

Answer 7

1. Cell checks fidelity of DNA
2. Preparation for nuclear division.

Question 8

What are the sub phases of mitosis?

Answer 8

1. Prophase
2. prometaphase
3. metaphase
4. anaphase
5. Telophase.
6. Cytokinesis

Question 9

What is cell - free mitosis?

Answer 9

Technique that allows scientists to study the process of mitosis outside of a living cell