Topic 2 - A : Cell structures (Mitosis)

Question 1

What is Interphase

Answer 1

Cell growth
G1, S and G2
DNA is unravelled and replicated alongside doubling the organelle to increase ATP production

Question 2

What happens in G1

Answer 2

Cell grows and new organelles and proteins are made

Question 3

What happens in S phase

Answer 3

Dna replication

Question 4

What happens in G2

Answer 4

Cell keeps growing and proteins needed for cell division are made

Question 5

What is the structure of chromosomes in mitosis

Answer 5

At start of mitosis it is in x shape, two sister chromatids joined in the middle by a centromere

Question 6

Describe Prophase

Answer 6

Chromosomes condense
Centrioles move to opposite poles of cell
Spindle fibres formed across cell
Nuclear envelope breaks down

Question 7

Describe Metaphase

Answer 7

The chromosomes line up at middle of cell
attach to spindle by their centromere

Question 8

Describe Anaphase

Answer 8

Sister chromatids separate
spindles contract pulling chromatids to opposite poles of cell