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Biology · 2024 · 3 marks
CBSE 2024 · Region 2 · Set 1 · Q25
(a) Differentiate between humoral immune response and cell-mediated immune response. (b) Draw a schematic diagram of an antibody molecule and label…
(a)
Differentiate between humoral immune response and cell-mediated immune response.
(b)
Draw a schematic diagram of an antibody molecule and label any four parts.
Marking-scheme solution
(a)
Humoral immune
response
Cell-Mediated immune
response
(i)
Mediated by B-lymphocytes Mediated by T- lymphocytes
(ii)
Antibodies are produced by
B-lymphocytes in the blood.
T- cells do not secrete antibodies but help B-cells to produce them.
(iii)
This is not responsible for
graft rejection.
This is responsible for the graft rejection.
(b)
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CBSE Class 12 Biology past-paper question from the 2024 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.