Immunity cell recognition and immune system

Question 1

Explain why antibody A attaches only to the protein found in species of
Plasmodium (genus)

Answer 1

-specific tertiary structure
- complimentary to binding site of protein

Question 2

on the Eliza test what is the point of the control antibody

Answer 2

• prevent false negative results
• show antibody has not bound to antibody in blood

Question 3

has a person tested positive for malaria?
- no colour change first antibody for one variant
-colour change for next variant
-colour change to test for false negative result

Answer 3

-person is infected with malaria
- infected with variant 2
- as colour dye causes colour change
-not infected with variant one as there is no colour change

Question 4

how does micro mRNA bind to mRNA which codes for cell death and what are the effects

Answer 4

-micro mRNA has complimentary base pairs to mRNA, binding to mRNA
- mRNA can no longer be read by ribosome
- proteins not translated
-proteins which cause cell death are not produced so increased cell division

Question 5

when is a protein made

Answer 5

translation

Question 6

when is mRNA made

Answer 6

transcription

Question 7

A mutation of a tumour suppressor gene can result in the formation of a tumour.

Answer 7

-forms non functioning proteins, inactivating/turning off gene
-uncontrolled cell division

Question 8

when a gene produces non functioning proteins what is the gene called?

Answer 8

turned off/ inactivated

Question 9

Using your knowledge of the structure of the cell-surface membrane, suggest how
LDL enters the cell.

Answer 9

-LDL specific tertiary structure binds to cell
- moves into cell via channel protein

Question 10

Suggest two reasons why the percentage of infants vaccinated decreased

Answer 10

-fewer cases
- fear of side effects