GATE XL format:mcq PYQs & Answers — Page 3

Questions 21–30 of 812. Imported answers require independent review unless marked reviewed.

Topic practice 812 questionsPage 3 of 82

The Kenedy pathway of cellular phospholipid biosynthesis is associated with _____.

Your answerChoose one option.

peroxisome

mitochondria

nucleus

endoplasmic reticulum

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Chymotrypsin cleaves polypeptides preferentially on the carbonyl side of aromatic, and some other bulky nonpolar residues. Trypsin cleaves on the carbonyl side of positively charged residues. Digestion of a polypeptide having the composition-Ala₂, Gly, Lys₂, Phe, Thr, Trp, Val, independently by these two proteases yielded peptide fragments as shown below.

Trypsin	Chymotrypsin
1. Ala-Ala-Trp-Gly-Lys	1. Gly-Lys
2. Thr-Phe-Val-Lys	2. Thr-Phe
	3. Val-Lys-Ala-Ala-Trp

Which one of the following is the correct primary structure of the polypeptide?

Your answerChoose one option.

Ala-Ala-Trp-Gly-Lys-Lys-Thr-Phe-Val

Thr-Phe-Val-Lys-Ala-Ala-Trp-Gly-Lys

Val-Lys-Ala-Ala-Trp-Gly-Lys-Thr-Phe

Thr-Phe-Ala-Ala-Trp-Val-Lys-Gly-Lys

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Which one of the following enzymes is NOT inhibited by glucose-6-phosphate?

Your answerChoose one option.

Hexokinase I

Hexokinase II

Hexokinase III

Hexokinase IV

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The following diagram represents energy states of different protein folding steps, which includes-

Folded

Transition

Molten globule

Unfolded

Find the correct match of folding steps (1 to 4) with the energy state (P to S) in the diagram.

Your answerChoose one option.

1-S, 2-R, 3-Q, 4-P

1-S, 2-R, 3-P, 4-Q

1-R, 2-Q, 3-S, 4-P

1-P, 2-Q, 3-R, 4-S

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The correct path of transfer of electrons in the light harvesting photosystems in vascular plants is _________.

Your answerChoose one option.

H₂O → Photosystem II → Cyt b₆f → Photosystem I → NADP⁺

H₂O → Photosystem I → Cyt b₆f → Photosystem II → O₂

H₂O → Photosystem II → Cyt b₆f → Photosystem I → O₂

H₂O → Photosystem I → Cyt b₆f → Photosystem II → NADP⁺

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For a simple enzyme that follows Michaelis-Menten kinetics, kinetic data was collected in the absence (dotted line, -I) or presence (solid line, +I) of an uncompetitive inhibitor (I). Which one of the following Eadie-Hofstee plots best describes the expected result?

(

= initial velocity, [S] = free substrate concentration)

Your answerChoose one option.

Diagram for Life Sciences question 40 (figure 2)

Diagram for Life Sciences question 40 (figure 3)

Diagram for Life Sciences question 40 (figure 4)

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Which one of the following plant families is characterized by the gynobasic style of female reproductive organ?

Your answerChoose one option.

Lamiaceae

Euphorbiaceae

Malvaceae

Poaceae

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Which one of the following plant organs typically exhibits all the four features listed below? (i) Starch-enriched endodermis (ii) Conjoint, collateral and open vascular bundle (iii) Endarch xylem (iv) Presence of medullary rays

Your answerChoose one option.

Dicot root

Monocot root

Dicot leaf

Dicot stem

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Correctly match the following molecules/methods in Group-I with their major uses in Group-II.

Group-I: (P) CRISPR-Cas9 (Q) DNA Microarray (R) Vir genes (S) RAPD

Group-II: (1) Global gene expression analysis (2) Molecular marker (3) Targeted gene editing (4) Agrobacterium-mediated plant transformation

Your answerChoose one option.

P–1; Q–3; R–2; S–4

P–3; Q–1; R–4; S–2

P–3; Q–1; R–2; S–4

P–1; Q–3; R–4; S–2

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Which one of the following commercial products is used as a systemic fungicide to control plant diseases?

Your answerChoose one option.

Captan

Phaltan

Thiram

Benomyl

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GATE XL format:mcq PYQs

Question 30

Question 36

Question 37

Question 38

Question 39

Question 40

Question 47

Question 48

Question 49

Question 50