2020 · Paper 1

Complete GATE XL 2020 Paper 1 overview, original pages and practice · Timed previous-paper practice

Questions 121–123 of 125. Imported answers require review unless explicitly marked reviewed.

Question 16

Open question

XL-UMCQ2 marksNeeds review

Which among the given options correctly explains the nature of the microbial culture represented by lines 1, 2 and 3 in the following figure?



Your answerChoose one option.

A.

Germination of spores

Homogeneous population

Mixed population of spores and vegetative cells

B.

Homogeneous population

Mixed population of heat sensitive and heat resistant microbes

Germination of spores

C.

Composite population

Spores activated by short exposure to heat

Thermo sensitive and thermo resistant microbes

D.

Mixed population

Microorganisms activated by short exposure to heat

Germination of spores

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Question 17

Open question

XL-UMCQ2 marksNeeds review

Match the equation/law in Column I with its application in Column II.

Column I | Column II P. Planck’s equation | 1. Terminal velocity Q. Arrhenius equation | 2. Freezing time R. Guggenheim-Anderson-de Boer equation | 3. Activation energy S. Stokes’ law | 4. Monolayer moisture content

Your answerChoose one option.

A.

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

B.

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

C.

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

D.

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

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Question 18

Open question

XL-UMCQ2 marksNeeds review

Match the absorber used in modified atmosphere packaging and storage in Column I with the scavenger in Column II.

Column I | Column II P. Oxygen absorber | 1. Calcium chloride Q. Carbon dioxide absorber | 2. Magnesium oxide R. Ethylene absorber | 3. Ferric oxide S. Moisture absorber | 4. Potassium permanganate

Your answerChoose one option.

A.

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

B.

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

C.

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

D.

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

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