Stem cellls

Question 1

What are stem cells?

Answer 1

are undifferentiated cells that are able to express all of their genes and divide by mitosis.

Question 2

Stem cells undergo ‘differentiation what does this mean?

Answer 2

This is the process by which cells become specialised for

different functions.

Question 3

Fully developed cells are unable to _______ by _______

Answer 3

divide by mitosis

Question 4

Totipotent stem cells can …

Answer 4

Can divide and differentiate into any type of cell

Question 5

Pluripotent stem cells can …

Answer 5

Can self-renew and differentiate into any type of

cell except the cells that make up the placenta.

Question 6

Multipotent stem cells can…

Answer 6

Can only differentiate and divide into a limited

number of cell types

Question 7

Unipotent stem cells can

Answer 7

Can only differentiate into a single type of cell

Question 8

Uses of Pluripotent stem cells

Answer 8

can be used to replace cells and treat human disorders like leukaemia and diabetes

Question 9

Meristem cells as stem cells

Answer 9

are involved in the production of new xylem and phloem tissue

Question 10

When are totipotent stem cells around?

Answer 10

only present in mammals in the first few cell divisions of an embryo.
{ During development, totipotent cells become specialised by expressing different genes and producing different proteins}