Health and Disease

Question 1

Explain how a father who is blood group A
and a mother who is blood group B can
have a child that has blood group O.

Answer 1

Both parents carry the recessive gene/ O allele

Offspring will inherit two recessive / O alleles

Question 2

A wire loop used to spread bacteria on an
agar plate was heated in a Bunsen burner
flame before being used.
Explain why this aseptic precaution was
used.

Answer 2

Bunsen flame kills microorganisms

Only the desired bacteria are transferred from the loop to the agar plate.

Question 3

Name the molecules on pathogens which

cause an immune response

Answer 3

Antigens

Question 4

Describe the steps in producing

monoclonal antibodies

Answer 4

Inject mammal with antigen
Select B lymphocytes that produces the (specific) antibody
fuse the tumour cells
to produce hybridoma

Question 5

What is cardiovascular disease?

Answer 5

Disease of the heart and/or circulatory system

Question 6

Name two ways of measuring obesity

Answer 6

BMI

Waist : Hip Ratio

Question 7

Name two different types of treatment for cardiovascular disease

Answer 7

Bypass surgery

Stent surgery

Question 8

Which term is used for organisms that spread disease from one host to another?

Answer 8

Vector

Question 9

Name a chemical defence against infection in the stomach

Answer 9

Hydrochloric acid

Question 10

Is alcoholic liver cirrhosis a communicable or non-communicable disease?

Answer 10

Non-communicable