GATE XL year:2020 PYQs & Answers — Page 7

Questions 61–70 of 125. Imported answers require independent review unless marked reviewed.

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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The technique of microbial “pure culture” was pioneered by

Your answerChoose one option.

Edward Jenner

Louis Pasteur

Robert Hooke

Robert Koch

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The antibacterial trimethoprim is an inhibitor of

Your answerChoose one option.

dihydrofolate reductase

dihydroorotate synthetase

-methylene tetrahydrofolate synthetase

serine hydroxymethyl transferase

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Choose the correct taxonomical hierarchy among the following:

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Species, Genus, Family, Order, Class, Phylum, Domain

Species, Genus, Order, Class, Family, Phylum, Domain

Species, Genus, Order, Family, Class, Phylum, Domain

Species, Genus, Family, Class, Order, Phylum, Domain

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Shifting a Saccharomyces cerevisiae culture from fermentative to aerobic respiratory mode will

Your answerChoose one option.

decrease carbon dioxide production

increase alcohol production

increase glucose consumption

decrease ATP generation per mole of glucose

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Which one of the following diseases is treated by a neuraminidase inhibitor?

Your answerChoose one option.

Chickenpox

Polio

Influenza

Japanese encephalitis

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GATE XL year:2020 PYQs

Question 16

Question 17

Question 18

Question 19

Question 20

Question 1

Question 2

Question 3

Question 4

Question 5