CUET · BIOLOGY · PYQ PAPER 2023

Identify the commensalism from the following associations:

A Fungi and roots of higher plants.
B Cuckoo and crow during breeding season
C Fig species and wasp
D Sea anemone and clown fish

Verified Solution

Answer & Solution

Correct Answer

(D) Sea anemone and clown fish

Step-by-step Solution

Detailed explanation

Sea anemone and clown fish

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 I	List ll
(A) alpha-1-antitrypsin	(I) Resistant to insect attacks
(B) Transgenic mice	(II) Genetically engineered insulin
(C) Eli Lily	(III) Testing safety of polio vaccine
(D) Bt crops	(IV) Treating Emphysema

Choose the correct answer from the options given below:

CUET 2023 Easy

Match List-I with List-II

List-I (Products)	List-II (Microorganisms)
(A) Wine or beer	(I) Penicillium notatum
(B) Swiss Cheese	(II) Aspergillus niger
(C) Antibiotic	(III) Propionibacterium sharmanii
(D) Citric Acid	(IV) Sachharomyces cerevisiae

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CUET 2025 Medium

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From CUET

Answer the question on the basis of passage given below:
Aldehydes are generally more reactive than ketones in nucleophilic addition reactions due to steric and electronic reasons. Sterically, the presence of two relatively large substituents in ketones hinders the approach of nucleophile to carbonyl carbon more than aldehydes having only one such substituent Electronically aldehydes are more reactive than ketones because two alkyl groups reduce the elctrophilicity of the carbonyl more effectively than in former.
Match List I with List II.

\(LISTI\)	\(LISTII\)
A. & \(CH _3 CH _2 CH _2 CHO \longrightarrow CH _3 CH _2 CH _2 COOH\)	I. \(CrO _3- H _2 SO _4\)
B. Cyclohexene → Hexane-1,6-dioic acid	II. \(\frac{ H _3 O ^{+}}{\Delta}\)
C. \(CH _3 CH _2 CH _2 CH _2 OH \rightarrow CH _3 CH _2 CH _2 COOH\)	III. Ammonical \(AgNO _3\)
D. \(CH _3 CONH _2 \rightarrow CH _3 COOH\)	IV. \(KMnO _4- H _2 SO _4 / \Delta\)

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CUET 2023 Medium

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