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Biology · 2025 · 2 marks
CBSE 2025 · Region 6 · Set 1 · Q19
(a) (i) Explain why the milk produced by the mother during the initial days of lactation is considered to be very essential for the newborn infant.…
(i)
Explain why the milk produced by the mother during the initial days of lactation is considered to be very essential for the newborn infant.
(ii)
What is the term used for the milk produced during the initial days of lactation ?
Many children in the metro cities are suffering from a very common exaggerated response of the immune system to certain weak antigens in air.
(i)
What is the term used for the above mentioned disease ?
(ii)
Name the main type of antibody produced by the immune system in response to this disease.
(iii)
Which two main inflammation-causing chemicals are produced by the mast cells in such an immune response ?
Marking-scheme solution
(a)(i)
Provides antibodies/provides IgA/ provide nutrition/ Provides passive immunity
(ii)
Colostrum
OR
(b)(i)
Allergy
(ii)
IgE
(iii)
Histamine and Serotonin
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CBSE Class 12 Biology past-paper question from the 2025 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.