ARS NET Agriculture Microbiology Previous Year Questions

By Kamal Pandey / April 11, 2021 / PhD Entrance

ASRB ICAR Agriculture Microbiology (ARS-NET) Previous Year Questions Part-1

We have created these questions by our ability to remember as many questions after giving the entrance exam, as the question paper is not made public by ASRB.

So, here are 20 questions to solve for now. The remaining questions are available on the below-mentioned links ↴

Part-2 Agriculture Microbiology

Part-3 Agriculture Microbiology

Part-4 Agriculture Microbiology

Previous Year ARS NET Questions

Agriculture Microbiology

Symbiotic relationship in which, one organism is benefitted and other remains unaffected.

Commensalism

Mutualism

Antagonism

Protocooperation

None

A relationship in which, one organism is adversely affected while the other remains unaffected.

Competition

Ammensalism

Protocooperation

Parasitism

None

Algae used in the production of single cell protein

Trichoderma, Pichia pastoris

Polyporus

Saccharomyces

Spirulina, Chlorella

None

Microorganisms which grow using diauxic growth pattern use the following. Mark the correct option.

Uninterrupted growth of microbes occur while shifting from one nutrient source to another

Uses both sources of nutrition simultaneously

Utilise only one nutrient for growth

Initially uses one nutrient for growth and then alters its metabolism to make use of the second.

None

The growth phase in which maximum number of bacteria are obtained.

lag

log

stationary

Death

None

The two step process in which ammonia is converted to nitrate is.

Assimilation

Dissimilation

Nitrification

Denitrification

None

The term mycorrhizae was coined by

Loius Pasteur

Charles Frank

A.B. Frank

A.M Hartig

None

Viroids have the genome of which type?

Single stranded DNA genome

Double stranded DNA genome

Single stranded RNA genome

Double stranded RNA genome

None

A process by which heavy metals are degraded using native microflora.

Vitrification

Phytoremediation

Bioremediation

Microbial cleansing

None

10.

Hops are used in the fermentation of beer. Which of the following is true regarding it.

These are chemicals which increase the durability of fermented product

Enhance the rate of fermentation

Are added in the primary fermentor.

Flavor enhancing and adds bitterness

None

11.

The zone where plant root is associated with soil containing enhanced microbial population is

Phyllosphere

Photosphere

Rhizoplane

Rhizosphere

None

12.

Ray fungi refer to which of the following.

Actinomycetes

Basidiomycetes

Ascomycetes

None

13.

The antibiotic produced by Bacillus subtilis

Cephalosporin

Bacitracin

Griseofulvin

Bactroban

None

14.

Earthy smell of soil after rain is due to the chemical substance

Geosmin produced by ascomycetes

Geosmin produced by actinomycetes

Geosmin produced by phycomycetes

Geosmin produced by basidiomycetes

None

15.

Degradation of paddy straws using earthworms

Vermiculture

Composting

Degradation by earthworms

Vermicomposting

None

16.

The form of Sulphur that can be easily up taken by plant and microorganisms is

SO₃^2-

SO₄^2-

SO₄^3-

S^2-

None

17.

Heterocyst found in

Anabaena

Riccia

Ulothrix

Albugo

None

18.

What is the significance of tetrazolium salts

Indicates cellular respiration and helps to detect microbial growth

Indicates oxygen demand for microbes

Helps aerobic microbes to survive in anaerobic conditions

Inhibits the growth of fungal contaminants

None

19.

The biochemical oxygen demand (BOD) test is an indirect measure of

organic matter that can be oxidized by the anaerobic microbes

organic matter that can be oxidized by the aerobic microbes

inorganic matter that can be oxidized by the aerobic microbes

inorganic matter that can be oxidized by the anaerobic microbes

None

20.

Activated sludge process degrade organic material and

Improve nutrients

Remove nutrients

Remove odour

Remove taste

None

Time's up

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