GATE XL exam:gate PYQs & Answers — Page 81

Questions 801–810 of 1235. Imported answers require independent review unless marked reviewed.

Topic practice 1235 questionsPage 81 of 124

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:

Your answerChoose one option.

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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Which one of the following does NOT provide three-dimensional images?

Your answerChoose one option.

Atomic force microscopy

Confocal scanning laser microscopy

Differential interference contrast microscopy

Phase-contrast microscopy

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Which one of the following will increase the resolution of a light microscope?

Your answerChoose one option.

Decreasing the numerical aperture of the objective lens

Using an objective lens with a longer working distance

Using a medium of higher refractive index

Increasing the wavelength of light

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Which one of the following conditions favors maximum expression of lac operon genes in E. coli?

Your answerChoose one option.

Glucose-low, lactose-low, cAMP-high

Glucose-high, lactose-low, cAMP-high

Glucose-low, lactose-high, cAMP-high

Glucose-high, lactose-high, cAMP-low

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Match the cellular organelle in Group I with its function in Group II.

Group I P. Golgi apparatus Q. Nucleolus R. Peroxisome S. Proteasome

Group II

Lipid degradation

Protein degradation

Protein sorting

Ribosomal RNA synthesis

Your answerChoose one option.

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

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

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

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

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A 250 μl of bacteriophage stock containing

phages/ml is added to 500 μl of E. coli culture containing

cells/ml. The multiplicity of infection is _____.

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GATE XL exam:gate PYQs

Question 1

Question 2

Question 3

Question 4

Question 5

Question 6

Question 7

Question 8

Question 9

Question 10