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 individual best remembered for bringing microbes to the world is

Robert Hooke

Antony Van Leeuenhoek

Robert Koch

Masaki Ogata

[#]

A single polar flagella is known as

monotrichous

lophotrichous

amphitrichous

none of these

[#]

The term facultative anaerobe refers to an organism that

doesn't use oxygen but tolerates it

is killed by oxygen

uses oxygen when present or grows without oxygen when absent

requires less oxygen than is present in air

[#]

Phosphate is considered to restrict the induction of

primary metabolites

secondary metabolites

both (a) and (b)

none of these

[#]

If ΔG of a chemical reaction is positive in value and k_eq is less than 1 then the chemical reaction will

proceed in reverse direction

proceeed in forward direction

not take place in any of the direction

none of these

[#]

Treatment with bacterial endotoxins results blast formation in

B cells

T cells

monocytes

none of these

[#]

Ascoli's thermoprecipition test helps in confirming the laboratory diagnosis of

tetanus

anthrax

typhoid

cholera

[#]

The technique(s), used for the assay of heat-labile enterotoxin produced by Escherichia coli, is/are

Steroid production in Yl mouse adrenal cell culture

Morphological changes in Chinese hamster ovary

Enzyme-linked immunosorbent assay

All of these

[#]

The __________ is the vegetative body of algae.

mycelium

plasmodium

pseudoplasmodium

thallus

[#]

10.

The symmetry of nucleocapsid of poxvirusps is/are

complex

icosahedral

helical

all of these

[#]

11.

Ethylene oxide is used to destroy or kill which of the following microbes?

Bacteria

Spores

Fungi

All of these

[#]

12.

The production of acetic acid from ethanol is an

anaerobic process

aerobic process

a combination of both

none of the above

[#]

13.

Why high concentration of sugars are not employed in the fermentation medium?

Calcium lactate is not produced

Calcium lactate crystallizes from the medium and slows down the process of fermentation

High sugar concentration itself crystallizes

None of the above

[#]

14.

Black kraut is caused by

the plant enzymes

the micro-organisms

the combined actions of plant enzymes and micro-organisms

none of the above

[#]

15.

An alkaline reaction in milk is caused by the alkali formers bacteria as

Pseudomonas fluorescens

A. viscolactis

both (a) and (b)

none of these

[#]

16.

Cheese with too low an acidity because of the addition of cream or the failure of the starter often is made gelatinous or slimy by

Pseudomonas

P. fragi

Alcaligenes metalcaligenes

all of these

[#]

17.

The chief spoilage organisms on smoked fish are

molds

bacteria

both (a) and (b)

fungi

[#]

18.

Which of the following disease is caused by DNA viruses?

Poliomyelitis

Yellow fever

Measles

Small pox

[#]

19.

Production of L-lysine can be carried out by

C. glutamicum

B. flavum FA 1-30

B. flavum

All of these

[#]

20.

The method used for obtaining citric acid as fermentation product are commonly known as

submerged aerated fermentation

stationary tray fermentation

both (a) and (b)

none of these

[#]

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