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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1.

What is Mycology?

Study of viruses

Study of nucleic acid

Study of bacteria

Study of fungi

[#]

2.

The third kingdom, protista, as suggested by E.H. Haeckel includes

bacteria

algae

fungi

all of these

[#]

3.

Organic molecules that increase the rate of metabolic reactions with themselves changing are known as

coenzymes

enzymes

substrates

reactants

[#]

4.

Which of the following catalyze liberation of orthophosphate from organic P compounds and inorganic pyrophosphate ?

Alkaline phosphates

Oxidoreductase

Protease

Hydrogenase

[#]

5.

Entner - Doudoroff pathway is not found in

aerobic prokaryotes

anaerobic prokaryotes

Both (a) and (b)

eukaryotes

[#]

6.

What are the Svedberg values for the subunits of the 70S ribosomes of E. colli?

40S and 30S

50S and 20S

50S and 30S

40S and 20S

[#]

7.

Differentiation of four different bases in automated sequencing systems is that each base has

different radioactive tag

cytosine at start

unique antibody bound to it

distinctive fluorescent tag

[#]

8.

The term used for plasmids possessing both RTF and r determinants is

non self-transmissible plasmids

non conjugative plasmids

conjugative plasmids

none of the above

[#]

9.

Macrophages are professional antigen- presenting cells. The protein molecule through which they present antigen in human is

actin

interleukin

HLA

CD8

[#]

10.

Anti-Rh antibodies are

IgG type

IgA type

IgE type

IgD type

[#]

11.

The gram-positive bacteria lack __________ structure/component?

outer membrane

murein

teichoic acid

plasma membrane

[#]

12.

Traveller's diarrhea is caused by

enteropathogenic Escherichia coli (EPEC)

entero invasive E. coli (EIEC)

entero toxigenic E. coli (ETEC)

entero haemorrhagic E. coli (EHEC)

[#]

13.

Which of the following virus is susceptible to chloroform?

Herpes

Influenza

Measles

All of these

[#]

14.

Which of the following viruses has not been associated with human cancer?

Hepatitis C virus

Hepatitis B virus

Varicella-Zoster virus

Herpes simplex virus type 2

[#]

15.

Which of the following disinfectants act by disrupting microbial membranes?

Cationic detergents

Halogens

Heavy metals

Aldehydes

[#]

16.

Cycloserine inhibits

alanine racemase

D-alanyl - D-alanine synthetase

Both (a) and (b)

amidase

[#]

17.

Examination of the presence / absence of organisms refers to

incubation of a food suspension in an enrichment medium followed by inoculation on to a suitable selective medium.

incubation of a food suspension in an enrichment medium followed by inoculation on to a non-selective medium.

incubation of a food suspension in an enrichment medium

none of the above

[#]

18.

Parsnip like odour and taste in beer is caused by

Flavobacterium proteus

Zygomonas anaeroium

Lactobacillus patorianus

S. carlsbergensis

[#]

19.

Bacillus thuringiensis is useful as a bacterial

source of antibiotics

producer of vitamins

herbicide

pesticide

[#]

20.

Inclusion bodies of measles virus are

intracytoplasmic

intranuclear

both (a) and (b)

none of these

[#]

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