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Biology · 2026 · 3 marks
CBSE 2026 · Region 1 · Set 2 · Q24
(a) Mention the scientific name of the source plant and the part from which opioids are extracted. (b) How are morphine and heroin related? Mention…
(a)
Mention the scientific name of the source plant and the part from which opioids are extracted.
(b)
How are morphine and heroin related? Mention the effect each one of them has on human body.
Marking-scheme solution
(a)
Source plant - Papaver somniferum
Part - latex of the plant
(b)
• Heroin is formed by acetylation of morphine.
• Morphine →It is effective sedative/ used as pain killer/ useful in patient who have undergone surgery
Heroin is a depressant / slows down body function
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CBSE Class 12 Biology past-paper question from the 2026 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.