Cell cycle and mitosis

Question 1

Stages of interphase

Answer 1

G1 - cell growth
S - DNA synthesis
G2 - cell growth

Question 2

Prophase (5)

Answer 2

• Nuclear envelope breaks down
• Nucleolus disappears
• Chromosomes become shorter and fatter
• Centrioles move to opposite poles
• Microtubules form the mitotic spindle

Question 3

Metaphase (2)

Answer 3

• Chromosomes line up on cell mid-line

- Chromosomes attach to the spindle by the centromere

Question 4

Anaphase (2)

Answer 4

• Sister chromatids separate at the centromere

- Spindles contract and pull chromatids to the poles of the cell

Question 5

Telophase (2)

Answer 5

• Chromatids decondense at the poles

- Nuclear envelopes form around the chromosomes