CUET · BIOLOGY · PYQ PAPER 2025

EcoRl, a significant tool in rDNA technology is -

A Bacteria
B Plasmid
C Enzyme
D Purine

Verified Solution

Answer & Solution

Correct Answer

(C) Enzyme

Step-by-step Solution

Detailed explanation

Enzyme

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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For a short electric dipole, identify the incorrect statement(s).
(A) The electric field intensity varies inversely with the cube of the distance from the center of the dipole.
(B) The electric field is directed from negative to positive charge.
(C) The electric potential at mid-point of the dipole is zero.
(D) The electric field intensity at mid-point of the dipole is zero.
Choose the correct answer from the option given below :

CUET 2025 Medium

Match List - I with List - II.

List - I (Electromagnetic waves)	List - II (Uses)
(A) Radio waves	(I) Aircraft navigation
(B) Ultraviolet rays	(II) Physical therapy
(C) Infrared waves	(III) Television communication systems
(D) Microwaves	(IV) Kill germs in water purifiers

Choose the correct answer from the options given below :

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LIST I	LIST II
A. Disrupting selection	I. A
B. Stabilising selection	II. D
C. Favouring medium sized individuals	III. C
D. Directional selection	IV. B