Online Microbiology Test - Microbiology Test - Random

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Total number of questions: 20.
Time allotted: 30 minutes.
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The enzymes that catalyze the reactions of the Krebs cycle are found in which subcellular organelle of eukaryotes?

Mitochondrion

Chloroplast

Ribosome

Endoplasmic reticulum

[#]

Which of the following microorganisms is classified as a member of archaebacteria?

Gyanobacteria

Methanobacteria

Trichomonads

Mycoplasma

[#]

Which of the following is true about cell wall of gram-positive bacteria?

It consists of multiple layers

It is thicker than that associated with gram-negative bacteria

It contains teichoic acids

All of these

[#]

Peptone water and nutrient broth are

selective media

enriched media

basal media

none of these

[#]

Which of the following is used for the proper maintenance and preservation of pure cultures?

Periodic transfer to fresh media

Preservation by overlaying cultures with mineral oil

Preservation by lyophilization

All of the above

[#]

The organism which obtain their energy from chemicals are designated as

prototrophs

chemotrophs

organotrophs

autotrophs

[#]

An organism is completely dependent on atmospheric O₂ for growth. This organism is

osmotolerant

acidophile

facultative anaerobe

obligate aerobe

[#]

Most of the energy in aerobic respiration of glucose is captured by

substrate-level phosphorylation

electron transport of electrons from NADH

long-chain fatty acid oxidation

the enzyme formic-hydrogen lyase

[#]

Proteomics is

the study of algal genomes

a branch of quantum physics dealing with proteins

the study of formation of lipo-protein in animals

the study of the entire collection of proteins expressed by an organism

[#]

10.

Simulation of which of the following will lead to appearance of first antibody to appear following stimulation by an antigen?

IgM

IgA

IgE

IgG

[#]

11.

Human transmission of Brucellae occurs by

ingestion of contaminated meat

direct contact with animal tissues

ingestion of infected milk

all of these

[#]

12.

The organism that starts out as amoeboid, phagocytic cells and converts to a sluglike pseudoplasmodium that migrates prior to development of a sorocarp belongs to which division?

Ascomycota

Chytridiomycota

Myxomycota

Oomycota

[#]

13.

A mutualistic association made up of a fungus and a cyanobacterium is called

a saprobe

a gamete

lichen

dimorphic

[#]

14.

Laminarin is an energy storage material characteristic of

chlorophyta

chrysophyta

phaeophyta

pyrrophyta

[#]

15.

The envelope of which of the following viruses is derived from the host cell nucleus?

Paramyxoviruses

Retroviruses

Orthomyxoviruses

Herpesviruses

[#]

16.

Which of the following is a limitation of the autoclave?

It takes too long to sterilize

It lacks the ability to inactivate viruses

It lacks the ability to kill endospores

It will destroy heat labile materials

[#]

17.

Which is not a form of biomass energy?

Incineration of solid waste

Composting to produce methane

Ethanol and methanol production for auto fuel

Photovoltaic production of hydrogen

[#]

18.

The micro-organism which is present in both fresh and frozen juices is

E. coli

Entereobacter aerogenes

P. chrysogenum

None of these

[#]

19.

Which is not a major defense mechanism in the stomach?

Proteolytic enzymes

Low pH

Dense normal flora

All of these

[#]

20.

The man who first discovered the chemical that causes souring of milk was

Pasteur

Scheele

Watson

Ronald Ross

[#]

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