CUET · BIOLOGY · PYQ PAPER 2025

Read the passage carefully and answer the given questions.
DNA Fingerprinting
Polymorphism in DNA sequence is the basis of genetic mapping of the human genome as well as of DNA fingerprinting. DNA fingerprinting involves identification of differences in some specific regions in the DNA sequence called repetitive DNA. It works on the principle of polymorphisms in DNA sequences. The repetitive DNA are separated from bulk genomic DNA. The bulk DNA forms a major peak and the other small peaks are referred to as satellite DNA. These repetitive/satellite DNA sequences show a high degree of polymorphisms and form the basis of DNA fingerprinting.
DNA polymorphism forms the basis of

A Transcription
B DNA replication
C Translation
D Genetic mapping and DNA fingerprinting.

Verified Solution

Answer & Solution

Correct Answer

(D) Genetic mapping and DNA fingerprinting.

Step-by-step Solution

Detailed explanation

Genetic mapping and DNA fingerprinting.

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.

Same subject

Match List-I with List-II
List-l (Species) List-II (Population interaction terms)
(A) Monarch butterfly (I) Brood parasitism
(B) Cuckoo bird (II) Commensalism
(C) Cuscuta (III) Camouflage
(D) Sea anemone and Clown fish (IV) Parasitism

Choose the correct answer from the options given below:

CUET 2025 Hard

Match List - I with List - II.

List - I	List - II
(A) Sexually transmitted disease	(I) Assisted reproductive technology
(B) Intra-uterine devices	(II) Detection of genetic disorder
(C) In-vitro fertilization	(III) Contraception method
(D) Amniocentesis	(IV) AIDS

Choose the correct answer from the options given below :

CUET 2023 Hard

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From CUET

If \(a, b\) and \(c\) are positive real numbers, then
Match List-I with List-II

List-I (Expression)	List-II (The Least value of the expression)
(A) \((a+b)(b+c)(c+a)\)	(I) \(8 a b c\)
(B) \((a+b+c)(a b+b c+c a)\)	(II) \(9 a^2 b^2 c^2\)
(C) \(\left(a^2+b^2+c^2\right)\left(a b^2+b c^2+c a^2\right)\)	(III) \(9 a b c\)
(D) \((a+b)^2(b+c)^2(c+a)^2\)	(IV) \(64 a^2 b^2 c^2\)

Choose the correct answer from the options given below:

CUET 2025 Medium

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List-I (Geological periods)	List-II (Plant forms)
(A) Cretaceous	(I) Seed ferns
(B) Jurassic	(II) Progymnosperms
(C) Carboniferous	(III) Sphenopsids
(D) Devonian	(IV) Conifers

List-1 (Molecule)	List-II (Van't Hoff Factor)
(A) Glucose	(I) 3
(B) \(K _2 SO _4\)	(II) 5
(C) \(Ca _3\left( PO _4\right)_2\)	(III) 1
(D) \(K _3\left[ Fe ( CN )_6\right]\)	(IV) 4

List-l (Species)	List-II (Population interaction terms)
(A) Monarch butterfly	(I) Brood parasitism
(B) Cuckoo bird	(II) Commensalism
(C) Cuscuta	(III) Camouflage
(D) Sea anemone and Clown fish	(IV) Parasitism