GATE ES topic:microbiology-health PYQs & Answers

Questions 1–6 of 6. Imported answers require independent review unless marked reviewed.

Malaria is caused by pathogenic _____.

Your answerChoose one option.

bacteria

fungi

protozoa

viruses

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Tuberculosis is predominantly caused by ________.

Your answerChoose one option.

Entamoeba histolytica

Salmonella typhi

Mycobacterium bovis

Bacillus cereus

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Read the following statements

I. Bacteriophage is an anaerobic bacterium.

II. Male-specific bacteriophage infect via the pili of other microorganisms including viruses.

III. Bacteriophage is found in human as well as in animal excreta.

IV. Bacteriophage can not indicate the presence of bacteria.

The correct choice is

Your answerChoose one option.

(I), (III) and (IV) are correct

(IV) is correct; (III) is incorrect

Both (II) and (IV) are incorrect

Both (II) and (IV) are correct

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Ten litres of the sample was filtered through a membrane filter and the filter was transferred to solid agar media which supports growth of coliform organisms. After incubation at 37 °C for 48 hours, the agar plates showed an average of 64 colonies per plate. What was the average concentration of coliform organisms (in Colony Form Units per unit volume) in the original water sample?

Your answerChoose one option.

64 CFU/ml

640 CFU/ml

6.4 × 10⁻³ CFU/ml

64 × 10⁻³ CFU/ml

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Reverse Transcriptase Polymerase Chain Reaction is an analytical procedure used in detection of pathogenic microorganisms. Which one of the following statements is NOT correct in this context?

Your answerChoose one option.

It is used for identifying presence or absence of specific RNA in samples.

It is used only for identifying Corona Viruses, including SARS CoV2 in samples.

It cannot differentiate between viable and inactivated viruses.

It is based on conversion of RNA to DNA followed by DNA amplification.

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In the context of water quality, which of the following is/are correct for the most probable number (MPN) of a water sample?

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

The estimated organisms are gram negative.

It is based on the assumption of Poisson distribution.

It measures the exact number of microorganisms present in the sample.

It includes the quantification of pathogenic virus.

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GATE ES topic:microbiology-health PYQs

How to practice topic:microbiology-health

Question 18

Question 15

Question 38

Question 16

Question 17

Question 39