May 2017

Question 1

Explain the advantages of lipid droplets and Michelle formation

Answer 1

Droplets increase SA for faster lipase action

Micelles carry fatty acids and glycerol through membrane

Question 2

How is golgi involved in absorption of lipids

Answer 2

Modifies triglycerides

Combines triglycerides with proteins

Forms vesicles

Question 3

Test used to identify amino acids

Answer 3

Biuret test

Question 4

Describe the process of crossing over and explain how it increases genetic diversity

Answer 4

Homologous pairs of chromosomes form ambivalent

Chiasma form

Alleles are exchanged

Producing new combinations of alleles

Question 5

Suggest and explain why AZT doesnt destroy HIV in body but stops or slows development of AIDS

Answer 5

Infected person has HIV DNA

New HIV particles made

AZT inhibits reverse transcriptase

AZT stops new HIV particles from forming new HIV DNA

Question 6

Suggest and explain 2 advantages of using HAART

Answer 6

Stops development of AIDS
As HIV resistant to AZT is damaged

No new HIV particles made
As HAART might interfere with viral protein synthesis