NCERT NEET Microbes Human welfare,Biology onlime mock,sample tests

Microbes in Human Welfare Mock Test-8

Question No:1

Root nodules of leguminous plants bear which microbe?

[A] Rhizopus
[B] Rhino Virus
[C] Rhizome
[D] Rhizobium



Question No:2

______ are free living bacteria which fix atmospheric nitrogen in soil,

[A] Azobacterium
[B] Acetobacterium
[C] Azotobacter
[D] Azabacterium



Question No:3

Fungi which form symbiotic associations with plants are ______.

[A] Rhizobium
[B] Mycorrhiza
[C] Azospirillum
[D] Oscillatoria



Question No:4

Mycorrhiza absorbs ______ from soil and passes it to the plant,

[A] K
[B] P
[C] Fe
[D] Mg



Question No:5

bacteria fix atmospheric N in aquatic and terrestrial environments.

[A] Cyanobacteria
[B] Azotobactor
[C] Methanobacteria
[D] Mycorrhiza



Question No:6

______ serve as an important bio-fertilizer in paddy fields,

[A] Cyanobacteria
[B] Azotobactor
[C] Methanobacteria
[D] Mycorrhiza



Question No:7

Which microbe adds organic matter to the soil to increase its fertility?

[A] Cyanobacteria
[B] Blue green algae
[C] Rhizobium
[D] Trichoderma



Question No:8

Assertion: In paddy field, cyanobacteria serve as important bio fertilizer.
Reason: Cyanobacteria can fix atmosphere nitrogen

[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 assertion
[C] If the assertion is true but the reason is false
[D] If both the assertion and reason are false



Question No:9

Assertion: Prions are proteinaceous infectious agents.
Reason: Prions are made up of Nucleoproteins.

[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 assertion
[C] If the assertion is true but the reason is false
[D] If both the assertion and reason are false



Question No:10

Assertion: LAB grow in milk & convert milk into curd.
Reason: LAB produce acid that coagulate and partially digest the milk protein.

[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 assertion
[C] If the assertion is true but the reason is false
[D] If both the assertion and reason are false



Question No:11

Assertion: There are large holes present in Swiss cheese.
Reason: Large holes produce due to production of large amount of SOby Propioni bacterium sharmanii.

[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 assertion
[C] If the assertion is true but the reason is false
[D] If both the assertion and reason are false



Question No:12

Assertion: Wine & Beer are produced without distillation.
Reason: Brewer’s yeast used for fermentation of malted cereals & fruit juices.

[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 assertion
[C] If the assertion is true but the reason is false
[D] If both the assertion and reason are false



Question No:13

Assertion: Lipases are used in detergent formation.
Reason: Lipases help in removing oily stains from laundry.

[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 assertion
[C] If the assertion is true but the reason is false
[D] If both the assertion and reason are false