Online Microbiology Test - Microbiology Test - Random

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Total number of questions: 20.
Time allotted: 30 minutes.
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Most microbial structures and enzymes are composed of

lipids

proteins

carbohydrates

lipids and carbohydrates

[#]

Which of the following is/are included in Kingdom Prokaryotae?

Bacteria

Protozoa

Fungi

All of these

[#]

Postgates assay technique is useful in determining if a cell is viable even though it is

incapable of cell division

too small to see

an obligate aerobe

a thermophile

[#]

High energy transfer compounds are capable of

accepting large amounts of free energy

transferring large amounts of free energy

measuring free energy

none of the above

[#]

In which of the following case a large lattice is formed?

Antibody is in excess

Antigens and antibodies are in optimal proportion

Antigen is in excess

None of these

[#]

Which of the following gram-negative bacteria is/are not aerobic?

Pseudomonas

Neisseria

Escherichia

None of these

[#]

In Widal test, the significant titre for O agglutinins is generally

1:50 or more

1:100 or more

1:150 or more

1:2.00 or more

[#]

Select the statement that does not apply to the kingdom Fungi

The fungi are eukaryotic, multicellular, ingestive heterotrophs

Some fungi form beneficial interrelationships with plants

The fungal life cycle typically includes a spore stage

Certain fungi are natural sources of antibiotic substances

[#]

Algae are found in all of the following places except

oceans

soils

lakes and streams

associates with fungi

[#]

10.

The predominant lipid substance found in the viral envelope is

phospholipids

glycolipids

neutral fat

all of these

[#]

11.

Who developed the concept of specific toxicity?

Pasteur

Fleming

Watson

Ehrlich

[#]

12.

Metabolism of dissolved organic material released by phytoplankton allows heterotrophic bacteria to become part of the particulate organic matter that is passed up the food web to be metabolized and released as mineral elements and CO₂ at each transfer. This sentence describes the

microbial loop

Winogradsky column

Redfield ratio

Gibbs free energy

[#]

13.

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

[#]

14.

Which of the following organism produces enzyme taka diastase?

A. oryzae

B. subtilis

A. niger

S. cerevisiae

[#]

15.

Which of the following microorganism produces only L(+) - lactic acid without further racemization ?

Leuconostoc mesenteroides

Lactobacillus delbrueckii

Rhizopus oryzae

Lactobacillus bulgaricus

[#]

16.

Black kraut is caused by

the plant enzymes

the micro-organisms

the combined actions of plant enzymes and micro-organisms

none of the above

[#]

17.

Shriveling in fermented pickles results from the physical effect of

too strong salt solution

too strong sugar solution

too strong vinegar solution

all of these

[#]

18.

Ropiness caused by Enterobacter usually is

worse at the middle of the milk

worse at the bottom of the milk

worse near the top of the milk

all of these

[#]

19.

The application of Gamma rays destroys botulism toxin. The dose of gamma rays required for this purpose is

73 Gy

73 Rad

7.3 Mrad

173 Rad

[#]

20.

The organisum used for production of streptomycin is

Streptomyces rimosus

Streptomyces griseus

Streptomyces aureofaciens

Streptomyces erythreus

[#]

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