GATE XL year:2018 PYQs & Answers — Page 8

Questions 71–80 of 125. Imported answers require independent review unless marked reviewed.

Binomial nomenclature has NOT yet been adopted for

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bacteria

fungi

viruses

protozoa

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Which of the following is NOT an accepted method for sterilization?

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Autoclaving

X-rays

Gama rays

UV rays

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The primary product of nitrogen fixation is

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N₂

NH₄⁺

NO₂⁻

NO₃

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In humans, the key stages in the life cycle of malarial parasites occur in

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red blood cells and the liver

red blood cells and platelets

red blood cells and the pancreas

red blood cells and the gut

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You have a 50 mg/mL stock solution of arginine. To prepare 1 liter of growth medium for an arginine auxotroph that requires 70 μg/mL of arginine, the volume of this stock solution that should be added is ____________ mL (up to 1 decimal point).

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Accumulating evidence suggest that Domain Archaea is more closely related to Domain Eukarya than to Domain Bacteria. Which of the following properties are shared between eukaryotes and archaea? (i) Protein biogenesis (ii) Presence of sterol containing membranes (iii) Ribosomal subunit structures (iv) Adaptation to extreme environmental conditions (v) Fatty acids with ester linkages in the cell membrane

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(ii), (iii) and (v)

(i), (ii), (iv), and (v)

(i) and (iii)

(ii) and (iv)

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Match the antimicrobial agents in group I with their category/mode of action in group II. Group I: (i) Fluoroquinolones; (ii) Amphotericin B; (iii) Tetracycline; (iv) Amoxicillin. Group II: (p) beta lactam antimicrobial; (q) inhibition of protein synthesis; (r) inhibition of nucleic acid synthesis; (s) antifungal agent

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(i)-(q), (ii)-(s), (iii)-(r), (iv)-(p)

(i)-(s), (ii)-(r), (iii)-(p), (iv)-(q)

(i)-(r), (ii)-(s), (iii)-(q), (iv)-(p)

(i)-(s), (ii)-(r), (iii)-(q), (iv)-(p)

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Match the microorganisms to their predominant modes of transmission. Microorganism: (i) Bordetella pertusis; (ii) Denge virus; (iii) Entamoeba histolytica; (iv) Hepatitis B virus. Mode of Transmission: (p) Vector-borne; (q) Blood-borne; (r) Droplet infection; (s) Contaminated food

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(i)-(r), (ii)-(p), (iii)-(s), (iv)-(q)

(i)-(s), (ii)-(q), (iii)-(p), (iv)-(r)

(i)-(q), (ii)-(p), (iii)-(s), (iv)-(r)

(i)-(s), (ii)-(r), (iii)-(p), (iv)-(q)

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Match the precursors/intermediates with the corresponding metabolic pathways. Precursor/Intermediates: (i) Inosine monophosphate; (ii) Ornithine; (iii) Chorismate; (iv) Homocysteine. Metabolic pathway: (p) L-methionine biosynthesis; (q) L-tryptophan biosynthesis; (r) Purine biosynthesis; (s) L-arginine biosynthesis

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(i)-(q), (ii)-(r), (iii)-(s), (iv)-(p)

(i)-(p), (ii)-(r), (iii)-(s), (iv)-(q)

(i)-(r), (ii)-(p), (iii)-(s), (iv)-(q)

(i)-(r), (ii)-(s), (iii)-(q), (iv)-(p)

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Match the scientists to their area of major contribution. Scientists: (i) Antonie van Leeuwenhoek; (ii) Carl Linnaeus; (iii) Sir Alexander Fleming; (iv) Louis Pasteur. Area of major contribution: (p) Taxonomy; (q) Antimicrobial agents; (r) Vaccination; (s) Microscopy

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(i)-(s), (ii)-(q), (iii)-(p), (iv)-(r)

(i)-(s), (ii)-(p), (iii)-(q), (iv)-(r)

(i)-(p), (ii)-(s), (iii)-(r), (iv)-(q)

(i)-(q), (ii)-(p), (iii)-(r), (iv)-(s)

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GATE XL year:2018 PYQs

Question 6

Question 7

Question 8

Question 9

Question 10

Question 11

Question 12

Question 13

Question 14

Question 15