GATE BT topic:microbes PYQs & Answers

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topic:microbes

Attempt a question, record the concept and assumptions, then check the available answer. Rework mistakes after revising the relevant concepts. Topic tags can overlap; review the question context.

Questions 1–10 of 18. Imported answers require independent review unless marked reviewed.

Topic practice 18 questionsPage 1 of 2

Which one of the following antibiotics blocks protein chain elongation by preventing the action of peptidyl transferase?

Your answerChoose one option.

Bleomycin

Rifampicin

Chloramphenicol

Tetracycline

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The correct sequence of the four steps involved in anaerobic production of biogas from complex organics is:

Your answerChoose one option.

Hydrolysis → Acidogenesis → Acetogenesis → Methanogenesis

Methanogenesis → Acetogenesis → Acidogenesis → Hydrolysis

Acidogenesis → Hydrolysis → Methanogenesis → Acetogenesis

Hydrolysis → Methanogenesis → Acidogenesis → Acetogenesis

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Correctly match the following Product classes with their representative Products.

Product class	Product
P. Biofuel	1. Cellulase
Q. Bioplast	2. Cephalosporin
R. Industrial enzyme	3. Butanol
S. Antibiotic	4. Poly-lactic acid
	5. Rituximab

Your answerChoose one option.

P-1; Q-5; R-3; S-2

P-3; Q-4; R-5; S-2

P-3; Q-2; R-1; S-5

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

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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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Match the industrial enzyme (Column I) with its application (Column II).

Column I　　　　　　　　　Column II P. Lipase　　　　　　　　 1. Maltose syrup production Q. Ficin　　　　　　　　　2. Oil degradation R. Amylase　　　　　　　　3. Oligosaccharide/monosaccharide production S. Glucosidase　　　　　　 4. Meat tenderization

Your answerChoose one option.

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

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

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

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

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Which of the following factors can affect the growth of a microbial culture in a batch cultivation process?

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

pH of the medium

Osmolarity of the medium

Substrate concentration in the medium

Substrate feed rate

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E. coli is inoculated in a shake flask containing nutrient rich medium. The initial number of viable cells in the medium is 10

. After few hours, the number of viable cells is 10

. Assuming cell divides by binary fission, the number of generations that have taken place is ______ (rounded off to the nearest integer).

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Which one of the following statements is TRUE about leghemoglobin?

Your answerChoose one option.

It binds oxygen to protect nitrogenase

It binds hemoglobin to protect oxygenase

It binds oxygen to protect hydrogenase

It binds oxygen to protect oxygenase

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Match the microbial product (Column I) with its respective application (Column II).

Column I: P. Methane Q. Glycolipids R. Polyhydroxy alkanoate

Column II:

Biosurfactant

Bioplastic

Biofuel

Your answerChoose one option.

P-1, Q-2, R-3

P-2, Q-1, R-3

P-3, Q-2, R-1

P-3, Q-1, R-2

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Decimal reduction time of a bacterial strain is

. Specific death rate constant in

(rounded off to two decimal places) is ________.

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GATE BT topic:microbes PYQs

How to practice topic:microbes

Question 20

Question 24

Question 19

Question 28

Question 37

Question 52

Question 58

Question 19

Question 23

Question 22