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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The cocci which forms a bunch and irregular pattern are

Staphylococci

diplococci

Tetracocci

Streptococci

[#]

The size of a single plant cell is usually within the range of

10-20μm in diameter and 25-100μm long

20-40μm in diameter and 100-200μm long

40-60μm in diameter and 200-300μm long

60-80μm in diameter and 300-400μm long

[#]

Hexose monophosphate pathway is also known as

phosphogluconate pathway

oxaloacetate pathway

malate pathway

fumerate pathway

[#]

Which of the following is the study of the molecular organization of genomes, their information content and the gene products they encode?

Genetics

Ergonomics

Genomics

Bioinformatics

[#]

The word, used for the small solid supports onto which are spotted hundreds of thousands of tiny drops of DNA that can be used to screen gene expression, is

southern blot

cloning library

DNA microarrays

northern blot

[#]

Chemically an antigen may be

lipid

protein

polysaccharide

any of these

[#]

Which is not a function of IgG?

Major antibody in serum

First antibody type produced against an antigen during the primary antibody response

Activates or fixes complement

Involved in opsonization

[#]

VDRL test is an example of

Tube test

Ring test

Slide test

none of these

[#]

Which of the following types of Clostridium perfringens produces alpha toxin most abundantly?

Type A

Type B

Type C

Type D

[#]

10.

Which of the following is not a function of cysts for Protozoa?

Protect against adverse environments

Sites for nuclear reorganization and cell division

Serve as a means of transfer between hosts in parasitic species

All of the above

[#]

11.

Algae is a nonvalid taxinomic term that refers to

eukaryotic organisms that have chlorophyll a and produce O₂

well developed cellular structure including a conducting system

Both (a) and (b)

none of the above

[#]

12.

Virulent and nonvirulent viruses may not

inhibit host cell DNA synthesis

inhibit host cell RNA synthesis

stimulate host cell macromolecule synthesis

degrade host cell DNA

[#]

13.

The nucleocapsid is covered by an outer membrane like structure called

envelope

covering

membronocapsid

all of these

[#]

14.

The cell lines which can support the growth of polioviruses is/are

Human amnion

Monkey kidney

HeLa

All of these

[#]

15.

One drawback to the use of ultraviolet light as a sterilizing agent is its

failure to kill bacteria

failure to bacterial spores

failure to kill microbes in a closed environment

failure to kill microbes located in the center of an object

[#]

16.

More promising chemotherapeutic agents for treating viral diseases is

leukocytic interferon

fibroblast interferon

interferon

nystatin

[#]

17.

Nitrogen fixation by the microorganisms can be detected by adopting the approach of

demonstrating growth in a nitrogen free medium

cultivating the microorganisms in the presence of nitrogen labeled with isotropic nitrogen

measuring¹⁵N₂ by mass spectrometer

all of the above

[#]

18.

The biogas production process takes place at the temperature

lesser than 25°C

25-40°C

45-60°C

all of these

[#]

19.

The predominant micro-organisms in frozen foods are

bacteria

micro-coccus

yeast and moulds

none of these

[#]

20.

Which of the following (s) is/are the major spoilage of soft drinks from the marked growth of yeasts and bacteria?

Cloudiness and ropiness

Flat sour spoilage

Superficial fungal spoilage

Pin-spot molding

[#]

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Online Microbiology Test - Microbiology Test - Random

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