CUET · BIOLOGY · PYQ PAPER 2025

Which of the following is incorrect with reference to drug abuse?

A Cannabinoids affect cardiovascular system of the body.
B Heroin is extracted from the latex of Papaver somniferum.
C Nicotine is a very effective sedative and pain killer.
D Excessive dosage of coca alkaloid causes hallucinations.

Verified Solution

Answer & Solution

Correct Answer

(C) Nicotine is a very effective sedative and pain killer.

Step-by-step Solution

Detailed explanation

Nicotine is a very effective sedative and pain killer.

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

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A. Molecular diagnosis	I. GEAC
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D. Validity of GM research	IV. Human alpha lactalbumin

List-l (Product)	List-II (Producer)
(A) Citric Acid	(I) Trichoderma polysporum
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(C) Statins	(III) Saccharomyces cerevisiae
(D) Cyclosporin A	(IV) Aspergillus niger

X	0	1	2	3
P(X)	0.2	k	2k	2k