Producing New Cells

Question 1

What is the purpose of cell division?

Answer 1

Growth and repair

Question 2

Stem cells are said to be…

Answer 2

Unspecialised, because they aren’t a specific type of cell

Question 3

How are more stem cells made?

Answer 3

Self-renewal, where the cells divide and produce more of them.

Question 4

What are 2 types of stem cells?

Answer 4

Embryonic stem cells - very early stage embryos

Tissue stem cells - parts of the body throughout life

Question 5

What is the difference between embryonic stem cells and tissue stem cells?

Answer 5

Embryonic stem cells are capable of becoming any type of body cell.

Tissue stem cells can only become a few types of cell.

Question 6

Why is the chromosome complement maintained during mitosis?

Answer 6

So that the daughter cells share the same function as the original cell.

Question 7

Stages of mitosis

Answer 7

Chromatids line up across the equator.

Spindle fibres contract and chromatids are pulled apart.

Chromosomes move to opposite ends of the cell

Nuclear membranes form

Cytoplasm divides