CH6 F4

Question 1

Name and explain mutation caused by exposure to radiation

Answer 1

Chromosome mutation
Meiosis is distrupted
Spindle fibre fail to function during anaphase 1
homologous chromosomes fail to seperate
causes Syndrom Turner//low sperm count

Question 2

Explain how cancer cell develops

Answer 2

Exposed to radioactive radiation like carcinogen
Cells divide uncontrolled//continuously and develop into a tumour
Cancer cells compete with other body cells to get nutrients

Question 3

Explain how radiotherapy works in inhibiting cancer cells

Answer 3

Use high ionization radiation where higher dosage is targeted to tumour area to kill cancer cell

Question 4

Justify action of donating a part of liver

Answer 4

Donor liver cell will divide through mitosis
Produces new cells rapidly
Liver will grow to original size

Question 5

Name and explain a technique to produce large number of a plant

Answer 5

Tissue culture
Explants are placed in a sterile culture medium
Culture medium contains growth hormone//nutrients
Explant divides through mitosis to form callus
Callus develops to produce a seedling

Question 6

Explain technique used in meat production in laboratory with one way to diversify the meat product

Answer 6

Through tissue culture using muscle cell which can be safely extracted from the blood tissue
Placed in culture medium that contains nutrients
Muscle cell will divides through mitosis to form meat tissue

make pre-cooked food