GATE XL purpose:exam-prep PYQs & Answers — Page 19

Questions 181–190 of 1235. Imported answers require independent review unless marked reviewed.

Correctly match the economically important specialized metabolites (Group I) with their broad chemical classes (Group II).

Group I: (P) Azadirachtin; (Q) Saponin; (R) Gallocatechin; (S) Cocaine; (T) Menthol Group II: (1) Monoterpene; (2) Alkaloid; (3) Triterpene glycoside; (4) Polyphenol; (5) Triterpene

Your answerChoose one option.

P-5; Q-3; R-2; S-4; T-1

P-2; Q-4; R-3; S-1; T-5

P-5; Q-3; R-4; S-2; T-1

P-3; Q-5; R-4; S-2; T-1

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Correctly match the following Arabidopsis genes (Group I) and the biological processes they primarily regulate (Group II).

Group I: (P) CLAVATA3; (Q) CONSTANS; (R) SCARECROW; (S) AGAMOUS. Group II: (1) Organ identity in flower; (2) Cell-type specification in root meristem; (3) Meristem size in shoot; (4) Photoperiodic floral transition

Your answerChoose one option.

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

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

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

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

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Correctly match the enzymes used as selectable markers (Group I) and the chemicals used for their selection (Group II).

Group I: (P) Neomycin phosphotransferase; (Q) Phosphinothricin acetyltransferase; (R) Dihydrofolate reductase; (S) 5-Enolpyruvyl shikimate 3-phosphate synthase. Group II: (1) Bialaphos; (2) Kanamycin; (3) Glyphosate; (4) Methotrexate

Your answerChoose one option.

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

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

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

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

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Which of the following sequential reactions correctly represent(s) the flow of electrons from NADH to O₂ in plant mitochondrial electron transport chain?

Your answerSelect all correct options. You can choose more than one.

NADH dehydrogenase → Ubiquinone → Succinate dehydrogenase → Cytochrome bc1 → Cytochrome c → Cytochrome c oxidase

NADH dehydrogenase → Succinate dehydrogenase → Ubiquinone → Cytochrome c → Cytochrome bc1 → Cytochrome c oxidase

NADH dehydrogenase → Ubiquinone → Alternative oxidase

NADH dehydrogenase → Alternative oxidase → Ubiquinone

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If rabbits are introduced in an isolated grassland for the first time, which of the following growth curves (shown using dashed line) is/are theoretically possible population dynamics over time?

(P)

(Q)

Diagram for Life Sciences question 63 (figure 2)

(R)

Diagram for Life Sciences question 63 (figure 3)

(S)

Diagram for Life Sciences question 63 (figure 4)

Your answerSelect all correct options. You can choose more than one.

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Which of the following reactions in plants is/are catalyzed by the malic enzymes?

Your answerSelect all correct options. You can choose more than one.

Malate + NAD⁺ → Pyruvate + CO₂ + NADH

Malate + NAD⁺ ⇌ Oxaloacetate + NADH

Malate ⇌ Fumarate

Malate + NADP⁺ → Pyruvate + CO₂ + NADPH

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In a genetic cross between a true-breeding tall parent bearing red flowers and a true-breeding dwarf parent bearing white flowers, only tall plants with red flowers are obtained in the F₁ population. Considering these two traits segregate independently, if one tall individual is selected from the F₂ population, the probability that it would be genotypically homozygous for plant height and make red flowers is __________ (Round off to two decimal places).

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Which one of the following metabolites is associated with bacterial stringent response?

Your answerChoose one option.

Cyclic di-GMP (c-di-GMP)

Guanosine tetraphosphate (ppGpp)

Cyclic-AMP (cAMP)

Cyclic-GMP (cGMP)

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India is aiming to be free of tuberculosis by 2025. One of the key approaches for this program is DOTS. Which one of the following options is the full form of DOTS?

Your answerChoose one option.

Directly observed therapy short-course

Directly observed tuberculosis short-course

District operated therapy system

Directly operated therapy short-course

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Correctly match the bacterial type in Column I with their corresponding environmental niche in Column II.

Column I P. Psychrophile Q. Barophile R. Mesophile S. Halophile

Column II i. Pressure greater than 380 atm ii. Temperature between 15°C and 45°C iii. Temperature below 15°C iv. pH less than 3.0 v. Salt concentration greater than 2M

Your answerChoose one option.

P - iii; Q - i; R - ii; S - v

P - ii; Q - iii; R - i; S - v

P - i; Q - iv; R - iii; S - v

P - v; Q - iii; R - iv; S - i

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GATE XL purpose:exam-prep PYQs

Question 59

Question 60

Question 61

Question 62

Question 63

Question 64

Question 65

Question 66

Question 67

Question 68