cell division and growth topic questions

Question 1

Describe the stages of mitosis result in the formation of two diploid cells(6)

Answer 1

Prophase
the nuclear membrane dissapreas
DNA unwinds and condenses into chromosome
chromatids
spindle fibres become visible

Metaphase
Chromosomes line up along the centre
Anaphase
Chromatids are pulled to the edges of the cell by the spindle fibres

Telophase
A nuclear membrane forms around each sets of chromosome

Cytokenisis occus splitting the the cytoplasam to create two seperate two diploid cells each with identical chromosomes

Question 2

Describe the function of meristem in the growth of a plant(2)

Answer 2

meristem cells are undifferentiated(1)
meristtem cells produces more cells(1)

Question 3

discuss the possible benefits of using adult stem cells with properties of embryonic stem cells(3)

Answer 3

have the potential to produce any cells(1)
no need to use embryonic cells(1)
Adult stem cells wont cause rejection(1)

Question 4

Explain how embryonic stem cells could be used to treat macular division(2)

Answer 4

Embryonic stem cells can be stimulated to produce cells of retina(1)

Which can be transplanted into a patients eye to replace the damaged cells(1)

Question 5

Explain how many cells are produced from fertillided egg,after two cell divisions by mitosis(2)

Answer 5

One cell produces two daughter cells for every division by mitosis(1)
two cell division steps produces 4 cells(1)

Question 6

Give two reasons why mitosis is important in living things(2)

Answer 6

for growth(1)
for repair(1)

Question 7

Give reason why stem cells could be used to treat neurological diseases(2)

Answer 7

stem cells can develop into a specific cells(1)
replace damage cell(1)

Question 8

Describe the process that occurs in prophase(2)

Answer 8

Chromosome condense(1)
Identical chromatids joined(1)