Mitosis

Question 1

Cell cycle

Answer 1

A series of stages when body cells in multicellular organisms divide to produce new cells

Question 2

Mitosis

Answer 2

Stage of the cell cycle when the cell divides

Question 3

What is mitosis used for?

Answer 3

Multicellular organisms use mitosis to grow or replace cells that have been damaged

Question 4

What does the end of the cell cycle result in?

Answer 4

2 new cells identical to the original cell, with the same number of chromosomes

Question 5

Growth and DNA replication - step 1

Answer 5

In a cell that’s not dividing, DNA is all spread out in long strings

Question 6

Growth and DNA replication - step 2

Answer 6

Before it divides, the cell has to grow and increase the amount of sub cellular structures such as mitochondria and ribosomes

Question 7

Growth and DNA replication - step 3

Answer 7

It then duplicates the DNA - one copy for each new cell. DNA is copies and forms X-shaped chromosomes. Each ‘arm’ of the chromosome is an exact duplicate of the other

Question 8

Mitosis - step 1

Answer 8

The chromosomes line up at the centre of the cell and cell fibres pull them apart. The 2 arms of each chromosome go to opposite ends of the cell

Question 9

Mitosis - step 2

Answer 9

Membranes form around each of the sets of chromosomes. These become the nuclei of the 2 new cells - the nucleus has divided

Question 10

Mitosis - step 3

Answer 10

The cytoplasm and cell membrane divide

Question 11

What has been produced at the end of mitosis?

Answer 11

2 new daughter cells containing exactly the same DNA - they’re identical. Their DNA is also identical to the parent cell