GATE XL topic:biological-sciences PYQs & Answers — Page 80

Questions 791–800 of 1235. Imported answers require independent review unless marked reviewed.

Group I, Group II and Group III represent enzyme, product of the enzymatic reaction, and metabolic process, respectively.

Group I: P. Hexokinase; Q. Fumarase; R. PEP Carboxylase; S. Glycolate oxidase

Group II: i. Malate; ii. Glucose 6-P; iii. Hydrogen peroxide; iv. Cinnamic acid; v. Oxaloacetic acid

Group III: 1. Glycolysis; 2. Photorespiration; 3. TCA cycle; 4. Photosynthesis

The CORRECT combination for Group I, Group II and Group III is

Your answerChoose one option.

P-ii-1, Q-iv-3, R-v-2, S-iii-4

P-ii-1, Q-i-3, R-iv-4, S-iii-2

P-ii-2, Q-v-3, R-i-4, S-iii-1

P-iii-1, Q-i-3, R-iv-4, S-ii-2

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Match the following in CORRECT combination between Group I and Group II with reference to the agents that interfere with oxidative phosphorylation

Group I: P. Cyanide; Q. Antimycin A; R. Aurovertin; S. 2,4-Dinitrophenol

Group II: i. Blocks electron transfer from cyt b to cyt c₁; ii. Inhibits F₁; iii. Uncoupling of phosphorylation from electron transfer; iv. Inhibits cytochrome oxidase; v. Inhibits K⁺ ionophore

Your answerChoose one option.

P-iv, Q-i, R-ii, S-iii

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

P-iv, Q-iii, R-ii, S-v

P-v, Q-ii, R-iii, S-iv

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In relation to Agrobacterium mediated genetic engineering in plants, match the following in CORRECT combination

Gene name: P. virA; Q. virB; R. virD1; S. virG

Function: i. Acetosyringone receptor; ii. Conjug tube formation; iii. Topoisomerase; iv. Inducer of all vir operons; v. Octopine synthesis

Your answerChoose one option.

P-iv, Q-iii, R-ii, S-v

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

P-i, Q-ii, R-iii, S-iv

P-iii, Q-i, R-ii, S-iv

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Match the plant part (Group I) with the product obtained (Group II) and the representative plant species (Group III) in CORRECT combination.

Group I

P. Bark

Q. Leaf

R. Flower

S. Fruit

Group II

i. Tannins

ii. Saffron

iii. Codeine

iv. Aromatic oil

Group III

Papaver somniferum

Camellia sinensis

Cinnamomum zeylanicum

Crocus sativus

Your answerChoose one option.

P-ii-1, Q-i-3, R-iv-2, S-iii-4

P-ii-1, Q-i-2, R-iv-4, S-iii-3

P-ii-2, Q-iv-3, R-i-4, S-iii-1

P-iv-3, Q-i-2, R-ii-4, S-iii-1

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Select the CORRECT combination by matching the disease, causal organism and the affected plant.

Disease	Causal organism	Affected plant
P. Stem rust	i. Cercospora personata	1. Wheat
Q. Wart disease	ii. Plasmopara viticola	2. Ground nut
R. Tikka/leaf spot	iii. Synchytrium endobioticum	3. Potato
S. Downy mildew	iv. Puccinia graminis	4. Grape
		5. Apple
		6. Rice

Choose the CORRECT combination:

Your answerChoose one option.

P-iv-1, Q-iii-3, R-ii-2, S-ii-4

P-ii-1, Q-i-6, R-iv-4, S-iii-2

P-iii-1, Q-iv-3, R-i-5, S-ii-4

P-iv-1, Q-ii-3, R-iii-2, S-i-5

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Match the following alkaloids with their uses and source plants in CORRECT combination

Your answerChoose one option.

P-ii-3, Q-iv-1, R-iii-4, S-i-2

P-ii-1, Q-i-3, R-iv-4, S-ii-2

P-ii-2, Q-iv-1, R-i-4, S-iii-3

P-iii-4, Q-ii-1, R-iv-3, S-i-2

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Match the following ecological terms with their appropriate definitions

Term | Definition P. Niche | i. Position of a species in food chain Q. Biota | ii. Place of a living organism in the biotic environment and its relates to food and enemies R. Trophic level | iii. Physical environment of an organism S. Habitat | iv. Totality of organisms (flora and fauna) in a given place or region

Your answerChoose one option.

P-i, Q-ii, R-iv, S-iii

P-ii, Q-iv, R-i, S-iii

P-iv, Q-iii, R-i, S-ii

P-iii, Q-i, R-ii, S-iv

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Arrange the following ‘water reservoirs of earth’ in decreasing order of water volume

P- Streams Q- Groundwater R- Glaciers S- Lakes and inland seas

Your answerChoose one option.

R-Q-S-P

P-Q-R-S

S-P-R-Q

R-P-Q-S

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Selection markers and the corresponding genes used in plant genetic engineering are given below

Choose the CORRECT combination

Your answerChoose one option.

P-ii, Q-i, R-iv, S-iii

P-iv, Q-ii, R-i, S-iii

P-iv, Q-i, R-ii, S-iii

P-iii, Q-iv, R-ii, S-i

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A double homozygous mutant develops green and wrinkled seeds. When it was crossed with a true-breeding plant having yellow and round seeds, all the F1 plants developed yellow and round seeds. After self-fertilization of F1, the calculated percentage probability of plants with green and wrinkled seeds in the F2 population (round off to 2 decimal places) is ________

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GATE XL topic:biological-sciences PYQs

Question 11

Question 12

Question 13

Question 14

Question 15

Question 16

Question 17

Question 18

Question 19

Question 20