Session 4 extras

Question 1

What is G0?

Answer 1

Stage of cell cycle that some cells enter, not all

Question 2

What happens in G0?

Answer 2

Cell is not going through cell cycle and dividing

simply performing its function

Question 3

How do cells enter G0?

Answer 3

From G1

Question 4

What are the types of G0?

Answer 4

Reversible
-quiscent

Irreversible

• differentiated
• senescent

Question 5

What is reversible G0?

Answer 5

Cell can re-enter G1 and go through cell cycle and divide

Question 6

What is irreversible G0?

Answer 6

Cell can never re-enter G1 and go through cell and divide

Question 7

What is irreversible differentiated G0?

Answer 7

Cell is completely mature

Question 8

What is irreversible senescent G0?

Answer 8

Cell has a lot of DNA damage

Question 9

Why does the nucleolus disappear in mitosis?

Answer 9

Because it is partly made up of DNA

which condenses into chromosomes at the beginning of mitosis

Question 10

How do homologous chromosomes find each other in meiosis metaphase 1?

Answer 10

Have similar genes, similar nucleotide base sequences

Question 11

How do sex chromosomes find each other in meiosis metaphase 1?

Answer 11

Have some homologous regions with similar genes, similar nucleotide base sequences