Online Microbiology Test - Microbiology Test - Random

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Total number of questions: 20.
Time allotted: 30 minutes.
Each question carries 1 mark; there are no negative marks.
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All membranes of free-living organisms have phospholipid bilayers, but exception is

bacteria

fungi

archaea

protozoa

[#]

The glyoxylate cycle is used by some microorganisms when___________ is the sole carbon source.

acetate

nitrate

carbon dioxide

all of these

[#]

In which of the following uracil is present?

RNA

DNA

Both (a) and (b)

None of these

[#]

False negative Mantoux test is observed in

early tuberculosis

Advanced tuberculosis

Severe malnutrition

All of these

[#]

Salmonellae can also be killed by

pasteurisation

chlorination

boiling

all of these

[#]

The reaction(s) that is/are usually positive in Escherichia coli, is/ are

Glucose fermentation

Indole reaction

Methyl red reaction

All of these

[#]

The most popular method for typing of Pseudomonas aeruginosa is

antibiogram

serotyping

bacteriophage

pyocin

[#]

The kelps are algae found in

chlorophyta

chrysophyta

phaeophyta

pyrrophyta

[#]

Negative strand ssRNA viruses need to have a preformed replicase when they invade a mammalian cell because they

use it to terminate transcripts when they copy host cell mRNA

have to make a positive strand copy that can be translated

use it to modify host enzymes that are recruited for viral replication

none of the above

[#]

10.

Which of the following items could be sterilized by dry heat sterilization?

Intravenous (IV) solution

Plastic IV bags

Glass pipettes

rubber gloves

[#]

11.

Which of the following tests is designed to simulate the natural conditions under which the disinfectants are used in hospitals?

Phenol coefficient test

Minimum inhibitory concentration test

Capacity test

None of these

[#]

12.

Nystatin is a drug used for treatment of diseases caused by

gram negative bacterium

gram positive bacterium

yeast

protozoan

[#]

13.

Fluoroquinolones are antibiotics which inhibit

DNA polymerase

RNA polymerase

DNA gyrase

Cross-linking of peptidoglycan

[#]

14.

__________ is an environment like __________ where microorganisms are functioning in an extremely thin film of water and where oxygen-containing air is close to them.

low oxygen diffusion environment; soils

high oxygen diffusion environment; soils

low oxygen diffusion environment; lakes

high oxygen diffusion environment; lakes

[#]

15.

Which of the following species of Clostridium is responsible for formation of dark green to black colours in cheese?

Clostridium tyrobutyricum

Clostridium sporogenes

Clostridium herbarum

None of these

[#]

16.

The fermentation of wine can be carried out using the strains of

Saccharomyces cerevisiae

Saccharomyces carlsbergenesis

Bacillus subtilis

Pedicoccus cerevisiae

[#]

17.

The most important organism involved in manufacture of Koji is

Aspergillus oryzae

Aspergillus soyae

both (a) and (b)

Lactobacillus lactis

[#]

18.

The other name of invertase enzyme is

sucrase

saccharase

isomerase

both (a) and (b)

[#]

19.

Most biopolymers produced by micro-organisms are

cell wall constituents

nucleic acids

histones

exopolysaccharides

[#]

20.

Which of the following viruses are relatively thermostable?

Human immunodeficiency virus

Rubella virus

Hepatits A virus

Influenza virus

[#]

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