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Biology · 2025 · 3 marks
CBSE 2025 · Region 2 · Set 1 · Q26
Samples of blood and urine of a sportsperson are collected before any sports event for drug tests. (a) Why there is a need to conduct such tests? (b)…
Samples of blood and urine of a sportsperson are collected before any sports event for drug tests.
(a)
Why there is a need to conduct such tests?
(b)
Name the drugs the authorities usually look for.
(c)
Write the generic names of two plants from which these drugs are obtained.
Marking-scheme solution
(a)
Sportspersons abuse certain drugs to increase their muscle strength and bulk and aggressiveness for better performance in sports.
(b)
Cocaine / coca alkaloids, cannabinoids
(c)
Erythroxylum, Cannabis
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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.