CUET · BIOLOGY · PYQ PAPER 2023

In India, the number of biosphere reserves and national parks are -

A 25 biosphere reserves and 100 national parks
B 14 biosphere reserves and 90 national parks
C 33 biosphere reserves and 70 national parks
D 20 biosphere reserves and 110 national parks

Verified Solution

Answer & Solution

Correct Answer

(D) 20 biosphere reserves and 110 national parks

Step-by-step Solution

Detailed explanation

20 biosphere reserves and 110 national parks

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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Match List - I with List - II.

LIST-I	LIST-I
(A) \(\csc ^{-1} x\)	(I) \((0, \pi)\)
(B) \(\sec ^{-1} x\)	(II) \(\left[-\frac{\pi}{2}, \frac{\pi}{2}\right]-\{0\}\)
(C) \(\tan ^{-1} x\)	(III) \(\left(-\frac{\pi}{2}, \frac{\pi}{2}\right)\)
(D) \(\cot ^{-1} x\)	(IV) \([0, \pi]-\left\{\frac{\pi}{2}\right\}\)

Choose the correct answer from the options given below:

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In which of one the following all the concentration terms are independent of temperature?

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List - I (Codes)	List - II (Codes for)
(A) UUU	(I) Phenyalanine
(B) AUG	(II) Initiator codon
(C) UAA	(III) Terminator codon
(D) GUU	(IV) Valine