GATE ES Prokaryotic and eukaryotic microorganisms PYQs & Answers

Questions 1–10 of 11. Imported answers require independent review unless marked reviewed.

Which of the following statements is/are CORRECT based on the electron donor (ED) and electron acceptor (EA) used in various bacterial mediated reactions in wastewater treatment?

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

In anaerobic heterotrophic acid fermentation, organic compounds are used as both ED and EA.

In anaerobic heterotrophic methanogenesis, volatile fatty acids and CO₂ are used as ED and EA, respectively.

In denitrification process by denitrifiers, organic compounds and CO₂ are used as ED and EA, respectively.

In aerobic autotrophic iron oxidation, Fe(II) and O₂ are used as ED and EA, respectively.

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Which one of the following is performed by autotrophic bacteria?

Your answerChoose one option.

Aerobic biodegradation of organic matter

Anaerobic biodegradation of organic matter

Aerobic nitrification

Anaerobic de-nitrification

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Choose the correct statement(s) from the following regarding the structure/ reproduction of microorganisms

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

Prokaryotes do not have nucleus but Eukaryotes have nucleus.

Both Prokaryotes and Eukaryotes have nucleus.

No binary fission happens in Eukaryotes, however, Prokaryotes rely on binary fission for reproduction.

Both Prokaryotes and Eukaryotes rely on binary fission for reproduction.

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Consider the following statements related to nitrification process:

(i) Electron acceptor type vary depending on whether nitrosomonas or nitrobacter is involved. (ii) Predominant carbon source is organic matter. (iii) Predominant carbon source is inorganic carbon. (iv) Electron donor during conversion of ammonium ions to nitrite ions is ammonium ions.

Choose the correct option(s) from the following

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

(iii) and (iv) are correct

(i) and (ii) are correct

(i) is incorrect and (iii) is correct

(ii) is correct and (iii) is incorrect

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Choose the correct option(s) from the following regarding the symbiotic relationships

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Lichens are a symbiotic association of fungi and bacteria. They can survive in extreme conditions of air pollution.

Lichens are a symbiotic association of fungi and bacteria. The fungi can absorb water and minerals from atmosphere, and bacteria can generate foods.

Lichens are a symbiotic association of fungi and algae. They can survive in extreme conditions, but are very sensitive to air pollution.

Lichens are a symbiotic association of fungi and algae. The fungi can absorb water and minerals from atmosphere, and algae can generate food through photosynthesis.

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Rod shaped bacterial cells are called _________.

Your answerChoose one option.

Bacilli

Cocci

Spirilla

Diplococci

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Which one of the following conversions belongs to nonsymbiotic nitrogen fixation?

Your answerChoose one option.

Atmospheric nitrogen to ammonia by Rhizobium bacteria in nodules attached to roots of legumes

Atmospheric nitrogen to ammonia by Azotobacter species

Nitrate to gaseous nitrogen under anaerobic conditions

Nitrate to ammonia under aerobic conditions

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Crown corrosion of reinforced cement concrete sewer is caused by ________.

Your answerChoose one option.

sulfur oxidising bacteria

iron oxidizing bacteria

denitrifying bacteria

fermentative bacteria

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Read the following statements

i. Aerobic heterotrophic bacteria uses organic matter for carbon source and energy source.

ii. Aerobic heterotrophic bacteria uses carbon dioxide for carbon source and energy source.

iii. Aerobic autotrophic bacteria uses carbon dioxide for carbon source and reduced substances for energy source.

iv. Aerobic autotrophic bacteria uses organic matter for getting energy.

The correct choice is

Your answerChoose one option.

(i) is correct; (ii) is correct

(iv) is correct; (i) is incorrect

(i) is correct; (iv) is correct

(ii) is correct; (iv) is incorrect

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A student wants to decide electron acceptor for aerobic, facultative and anaerobic bacteria. In this context, read the following statements

i. Dissolved Oxygen (DO) can act as electron acceptor for aerobic bacteria. ii. Nitrite can act as electron acceptor for aerobic bacteria. iii. Dissolved Oxygen (DO) can act as electron acceptor for anaerobic bacteria. iv. Nitrite can act as electron acceptor for facultative bacteria. The correct choice is

Your answerChoose one option.

(i) is correct; (iv) is correct

(ii) is correct; (iii) is incorrect

(ii) is correct; (iii) is correct

(i) is correct; (ii) is correct

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GATE ES Prokaryotic and eukaryotic microorganisms PYQs

How to practice Prokaryotic and eukaryotic microorganisms

Question 43

Question 15

Question 25

Question 26

Question 30

Question 14

Question 16

Question 17

Question 16

Question 17