AQA
A-Level
BIOLOGY
3.2 | b Immunity
Cell Recognition and Immune system
Time allowed
50 minutes
MARK SCHEME
Score Percentage
/40 %
4.1 | CELL BIOLOGY | QUESTION PAPER 1 1
, (a) 1. Antibody has tertiary structure;
2. Complementary to binding site on protein.
2
(b) 1. Prevents false negative results;
2. (Since) shows antibody A has moved up strip / has not bound to any
Plasmodium protein.
2
(c) 1. Person is infected with Plasmodium / has malaria;
2. Infected with (Plasmodium) vivax;
3. Coloured dye where antibody C present;
4. That only binds to protein from vivax / no reaction with antibody for
falciparum.
Person is infected with P. vivax / Plasmodium vivax = 2
marks (MP1 and MP2)
4
[8]
A-Level
BIOLOGY
3.2 | b Immunity
Cell Recognition and Immune system
Time allowed
50 minutes
MARK SCHEME
Score Percentage
/40 %
4.1 | CELL BIOLOGY | QUESTION PAPER 1 1
, (a) 1. Antibody has tertiary structure;
2. Complementary to binding site on protein.
2
(b) 1. Prevents false negative results;
2. (Since) shows antibody A has moved up strip / has not bound to any
Plasmodium protein.
2
(c) 1. Person is infected with Plasmodium / has malaria;
2. Infected with (Plasmodium) vivax;
3. Coloured dye where antibody C present;
4. That only binds to protein from vivax / no reaction with antibody for
falciparum.
Person is infected with P. vivax / Plasmodium vivax = 2
marks (MP1 and MP2)
4
[8]
