Microbes In Human Welfare

Biology
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Assertion

Broad spectrum antibiotics are produced by streptomyces

Reason

They can destroy microorganisms by inhibiting DNA replication or protein synthesis.

A
If both the assertion and the reason are true and the reason is a correct explanation of the assertion
B
If both the assertion and reason are true but the reason is not a correct explanation of the assert!on
C
If the assertion ts true but the reason !s false
D
If both the assertion and reason are false
Medium
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Which of the following symbiotic association is useful as biofertilizer?

A
Rhizobium and leguminous roots
B
Azolla and Anabaena
C
Both A and B
D
None of the above
Medium
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Biodegradable pollutant among the following is _______.

A
Plastic
B
Asbestos
C
Sewage
D
All of the above
Medium
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"Dodder" can transmit

A
Mycoplasmal diseases
B
Viral diseases
C
Both A and B
D
None of the above
Medium
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Product of which of the following organisms has been commercialized as blood cholesterol lowering agent?

A
Trichoderma polysporum
B
Saccharomyces cerevisiae
C
Aspergillus niger
D
Monascus purpureus
Medium
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First antibiotic discovered was ____________.

A
Penicillin
B
Ampicillin
C
Celin
D
Erythrocin
Medium
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Sewage water can be purified for recycling with the action of

A
Non-biodegradable chemicals
B
Penicillin
C
Microorganisms
D
Fishes
Medium
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Azolla is used as a biofertilizer because 

A
Azolla multiplies very fast to produce massive biomass.
B
Azolla has association with nitrogen-fixing Rhizobium.
C
Azolla has association of nitrogen fixing cyanobacteria.
D
Azolla has association of mycorrhiza.
Medium
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When a natural predator applied on the other pathogenic organisms to control them, this process is called as

A
Biological control
B
Genetic engineering
C
Confusion technique
D
Artificial control
Medium
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