chapter 2

Question 1

Describe the 3 stages of the cell cycle

Answer 1

Stage 1) Replication of DNA to form two copies of each chromosome and synthesis of new sub-cellular structures
Stage 2) mitosis (nucleus divides)
Stage 3) cell divides in 2

Question 2

why is mitotic cell division important (3)

Answer 2

in growth, repair and development of multicellular organisms

Question 3

what occurs in mitosis

Answer 3

one set of chromosome is pulled to each end of the cell and the nucleus divides

Question 4

where does mitosis take place in plants

Answer 4

in the meristems in shoot and root tips

Question 5

what replaces dead or dying cells in the body

Answer 5

adult stem cells

Question 6

definition of stem cells

Answer 6

they can be cloned and made to differentiate into many different type of cells.

Question 7

what can stem cells treat (2)

Answer 7

paralysis, diabetes

Question 8

what can stem cells from meristems in plants be used to do (2)

Answer 8

used to produce new plant clones quickly and economically

Question 9

Benefits of embryonic stem cells (2)

Answer 9

1) able to help conditions like diabetes

2) it isn’t rejected from the patient body

Question 10

Downsides to the use of embryonic stem cells

Answer 10

The use of stem cells has potential risks and some people have ethical or religious objections