GATE BT year:2025 PYQs & Answers — Page 3

Questions 21–30 of 65. Imported answers require independent review unless marked reviewed.

Topic practice 65 questionsPage 3 of 7

Which of the following features is/are used to distinguish Archaea from Bacteria?

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

Gram-staining

Peptidoglycan in the cell wall

Presence of N-acetylglucosamine

16S rRNA sequences

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Which of the following enzymes is/are involved in the biogenesis of miRNA?

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

Drosha

Cas9

XRCC4

Dicer

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Which of the following separation processes is/are based on molecular size?

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

Size-exclusion chromatography

Ion exchange chromatography

Membrane ultrafiltration

Ultracentrifugation

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Which of the following show(s) optical activity at 100 mM concentration in water?

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

Solution of NaCl

Solution of D-Glucose

Solution of Glycine

Solution of L-Proline

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Which of the following fluids exhibit(s) non-Newtonian behavior at 25 °C?

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

Toothpaste

Mercury

Brine

Blood plasma

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Which of the following compounds have the same degree of reduction per carbon-mole?

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

Glucose

Lactic acid

Acetic acid

Formic acid

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A recombinant protein is secreted extracellularly in soluble form by an E. coli culture. Which of the following downstream processes is/are involved in the purification of the extracellular secreted protein?

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

Cell disruption

Membrane ultrafiltration

Solubilisation of inclusion bodies

Liquid chromatography

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If the doubling time of a bacterial population is 3 hours, then its average specific growth rate during this period is _____ h⁻¹.

(Round off to two decimal places)

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For a mechanically reversible isobaric process taking place in a closed system involving 5 moles of an ideal gas, the temperature increases from an initial value of 300 K to a final value of 450 K. If the specific heat capacity at constant volume (Cᵥ) is given as 12.5 J mol⁻¹ K⁻¹ and gas constant is 8.314 J mol⁻¹ K⁻¹, the amount of heat transferred to the system will be _____ J.

(Round off to the nearest integer)

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The allele associated with albinism in humans is recessive (c). The probability that an albino male (cc) and a carrier female (Cc) will have an offspring with normal skin pigmentation is _____ .

(Round off to one decimal place)

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GATE BT year:2025 PYQs

Question 21

Question 22

Question 23

Question 24

Question 25

Question 26

Question 27

Question 28

Question 29

Question 30