Mitosis B2

Question 1

Why do eukaryotes require a constant supply of new cells?

Answer 1

For growth, development and repair.

Question 2

What are the 3 stages of the cell cycle?

Answer 2

1. Growth
2. DNA replication and mitosis
3. Cytokinesis (division)

Question 3

What happens to the cell during the growth stage?

Answer 3

The cell increases in size which increases the number of sub-cellular structures it contains.

Question 4

What happens during the mitosis stage of the cell cycle?

Answer 4

The DNA is duplicated so that the 2 new cells will be able to have a full set of chromosomes.

Question 5

What happens during mitosis?

Answer 5

The cell duplicated chromosomes so that they form an X shape. The cell lines up the 46 chromosomes along the centre of the cell and cell fibres pull each arm to one pole of the cell.

Question 6

What happens during cytokinesis?

Answer 6

The cell membrane and cytoplasm pull apart making 2 daughter cells which are genetically identical to each other and the parent cell.