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Biology · 2025 · 2 marks
CBSE 2025 · Region 2 · Set 2 · Q17
Student to attempt either option (A) or (B). (A) (i) Identify 'P' and 'Q' labelled in the diagram. (ii) Specify the source of the hormone 'P' and 'Q'…
Student to attempt either option (A) or (B).
(i)
Identify 'P' and 'Q' labelled in the diagram.
(ii)
Specify the source of the hormone 'P' and 'Q' marked in the diagram.
(i)
Identify 'P' and 'Q' labelled in the above diagram.
(ii)
Write down the role of hormone 'P' in both males and females.
Marking-scheme solution
(A)(i)
P- Estrogen, Q- Progesterone
(ii)
P- Growing follicles, Q- Corpus luteum
OR
(B)(i)
P- Lutenizing hormone(LH) , Q- Follicle stimulating hormone (FSH)
(ii)
• In male- Acts at the Leydig cells and stimulate the synthesis and secretion of androgen
• In Female- Causes ovulation/ rupturing of graffian follicle/
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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.