B2-Cells & Control

Question 1

Describe mitosis

Answer 1

The cells divide into two genetically identical diploid cells

Question 2

Describe the importance of mitosis

Answer 2

For growth and tissue repair

Question 3

How many cells are produced from a fertilised egg after two divisions of mitosis - explain

Answer 3

One division produces two daughter cells, two divisions produces four daughter cells.

Question 4

Describe the events that take place in the cell during interphase

Answer 4

normal cell processes and DNA replication

Question 5

Describe what happens during anaphase of mitosis

Answer 5

The chromatids split then are pulled apart to opposite ends of the cell by spindle fibres

Question 6

Which process occurs causing the divided cells to become specialised?

Answer 6

Differentiation

Question 7

Describe the process of fertilisation

Answer 7

The nuclei of a sperm and egg cell fuse together to make a diploid zygote

Question 8

Name the two organs of the central nervous system (CNS)

Answer 8

Brain and spinal cord

Question 9

How does the axon carry information along the neurone

Answer 9

As electrical impluses

Question 10

State the name of the gap between neurones

Answer 10

Synapse