GATE BT purpose:exam-prep PYQs & Answers — Page 33

Questions 321–330 of 650. Imported answers require independent review unless marked reviewed.

Consider a piston-cylinder assembly shown in the figure below. The walls of the cylinder are insulated. The cylinder contains 1 mole of an ideal gas at 300 K and the piston is held initially at the position

using a stopper. After the stopper is removed, the piston suddenly rises against atmospheric pressure (

Pa) to the new position

where it is held by another stopper.

The heat capacity (

) of the gas is 12.5 J mol

. The cross-sectional area of the cylinder is

. Assume the piston is weightless and frictionless.

m, the final temperature of the gas (rounded off to nearest integer) is __________ K.

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Consider the growth of S. cerevisiae under aerobic condition in a bioreactor and the specific growth rate of yeast is 0.5 h

. The overall reaction of the process is

The heat of combustion values for different compounds are tabulated below with the reference to CO

, H

O, O

, and N

at standard conditions.

Compound	Heat of combustion (kJ mol )
C H O	2802
NH	383
CH O N	560
C H O	1366

The specific rate of heat production (rounded off to nearest integer) is ____________ kJ mol

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A pilot sterilization was carried out in a vessel containing 100 m

medium with an initial spore concentration of 10

spores/ml. The accepted level of contamination after sterilization is 1 spore in the entire vessel. The specific death rate constant for the spore is 2 min

at 121 °C. Assuming no death takes place during the heating and cooling cycles, the holding time at 121 °C (rounded off to nearest integer) is ____________ min.

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A circular plasmid has three different but unique restriction sites for enzymes ‘a’, ‘b’ and ‘c’. When enzymes ‘a’ and ‘b’ are used together, two fragments of equal size are generated. Enzyme ‘c’ creates fragments of equal size only from one of the fragments generated by those cleaved by ‘a’ and ‘b’. The plasmid is treated with a mixture of ‘a’, ‘b’ and ‘c’ and analysed by agarose gel electrophoresis. The number of bands observed in the gel is __________.

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A bacterial strain is grown in nutrient medium at 37 °C under aerobic conditions. The medium is inoculated with 10

cells from a seed culture. If the number of cells in the culture is 10

after 10 hours of growth, the doubling time of the strain (rounded off to nearest integer) is ____________ h.

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The ratio of boys to girls in a class is 7 to 3. Among the options below, an acceptable value for the total number of students in the class is:

Your answerChoose one option.

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A polygon is convex if, for every pair of points, P and Q belonging to the polygon, the line segment PQ lies completely inside or on the polygon. Which one of the following is NOT a convex polygon?

Your answerChoose one option.

Diagram for Biotechnology question 2 (figure 2)

Diagram for Biotechnology question 2 (figure 3)

Diagram for Biotechnology question 2 (figure 4)

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Consider the following sentences: (i) Everybody in the class is prepared for the exam. (ii) Babu invited Danish to his home because he enjoys playing chess. Which of the following is the CORRECT observation about the above two sentences?

Your answerChoose one option.

(i) is grammatically correct and (ii) is unambiguous

(i) is grammatically incorrect and (ii) is unambiguous

(i) is grammatically correct and (ii) is ambiguous

(i) is grammatically incorrect and (ii) is ambiguous

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A circular sheet of paper is folded along the lines in the directions shown. The paper, after being punched in the final folded state as shown and unfolded in the reverse order of folding, will look like ______.

Your answerChoose one option.

Diagram for Biotechnology question 4 (figure 2)

Diagram for Biotechnology question 4 (figure 3)

Diagram for Biotechnology question 4 (figure 4)

Diagram for Biotechnology question 4 (figure 5)

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______ is to surgery as writer is to ______ Which one of the following options maintains a similar logical relation in the above sentence?

Your answerChoose one option.

Plan, outline

Hospital, library

Doctor, book

Medicine, grammar

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GATE BT purpose:exam-prep PYQs

Question 61

Question 62

Question 63

Question 64

Question 65

Question 1

Question 2

Question 3

Question 4

Question 5