CUET · BIOLOGY · PYQ PAPER 2023

In Sickle-cell anemia the substitution of amino acid in the globin protein results due to the single base substitution at the sixth codon of the \(\beta\)-globin gene from _________.

A GAG to AUG
B GAG to GUG
C CAG to AUG
D UAG to GUG

Verified Solution

Answer & Solution

Correct Answer

(B) GAG to GUG

Step-by-step Solution

Detailed explanation

GAG to GUG

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 II)
A. For any vector \(\vec{a}, \vec{a} \times \vec{a}\)	\(I\). \(\|\vec{a}\|^2\)
B. For any vector \(\vec{a}, \vec{a} \cdot \vec{a}\)	\(II.\) \(0\)
C. If either \(\vec{a}=\overrightarrow{0}\) or \(\vec{b}=\overrightarrow{0}\), then \(\vec{a} \cdot \vec{b}\) is	\(III.\) \(\|\vec{a}\|\|\vec{b}\|\)
D. If the angle between \(\vec{a}\) and \(\vec{b}\) is \(\theta=0\), then \(\vec{a} \cdot \vec{b}\) is	\(IV.\) \(\overrightarrow{0}\)

Choose the correct answer from the options given below:

CUET 2023 Medium

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LIST I	LIST II
A. Female bird	I. ZZ
B. Male bird	II. XX
C. Male grasshopper	III. ZW
D. Female Drosophila	IV. XO