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

Microbes in Human Welfare Mock Test-9

Question No:1

Assertion: Bottled fruit juices bought from the market are clearer as compared to those made at home.
Reason: Bottled juices are clarified by the use of pectinases and proteases.

[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:2

Assertion: Streptokinase is given to patient suffering from myocardial infarction.
Reason: Streptokinase act a clot -buster.

[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:3

Assertion: Greater is BOD of waste water, more is its polluting potential.
Reason: BOD is a measure of organic matter present in water.

[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:4

When domestic sewage mixes with river water

[A] Small animals like rats will die after drinking river water
[B] The increased microbial activity releases micronutrients such as iron
[C] The increased microbial activity uses up dissolved oxygen
[D] The river water is still suitable for drinking as impurities are only about 0.1%



Question No:5

An example of endomycorrhiza is:

[A] Nostoc
[B] Glomus
[C] Agaricus
[D] Rhizobium



Question No:6

Select the correct statement from the following

[A] Biogas is produced by the activity of aerobic bacteria on animal waste
[B] Methanobacterium is an aerobic bacterium found in rumen of cattle
[C] Biogas, commonly called gobar gas, is pure methane
[D] Activated sludge-sediment in settlement tank of sewage treatment plant is a right source of aerobic bacteria



Question No:7

A common biocontrol agent for the control of plant diseases is

[A] Baculovirus
[B] Bacillus thuringiensis
[C] Glomus
[D] Trichoderma



Question No:8

Which one of the following is not used in organic farming?

[A] Glomus
[B] Earthworm
[C] Oscillatoria
[D] Snail



Question No:9

Read the following statement having two blanks (A and B).
“A drug used for A patients is obtained from a species of the organism B The one correct option for the two blanks is

[A] Heart— Penicilliumm
[B] Organ-transplant —Trichoderma
[C] Swine flu— Monascus
[D] AIDS —Pseudomonas



Question No:10

Which one of the following is a wrong matching of a microbe and its industrial product, while the remaining three are correct?

[A] Yeast – statins
[B] Acetobacter aceti – acetic acid
[C] Clostridium butylicum – lactic acid
[D] Aspergillus niger – citric acid



Question No:11

Which of the following is mainly produced by the activity of anaerobic bacteria on sewage?

[A] Propane
[B] Mustard gas
[C] Marsh gas
[D] Laughing gas



Question No:12

Which one of the following helps in absorption of phosphorus from soil by plants?

[A] Rhizobium
[B] Frankia
[C] Anabaena
[D] Glomus



Question No:13

Continuous addition of sugars in ‘fed batch’ fermentation is done to:

[A] Obtain antibiotics
[B] Purify enzymes
[C] Degrade sewage
[D] Produce methane



Question No:14

Secondary sewage treatment is mainly a:

[A] Mechanical process
[B] Chemical process
[C] Biological process
[D] Physical process



Question No:15

Which one of the following is not a bio fertilizer?

[A] Rhizobium
[B] Nostoc
[C] Mycorrhiza
[D] Agrobacterium



Question No:16

The most common substrate used in distilleries for the production of ethanol is:

[A] Soya meal
[B] Ground gram
[C] Molasses
[D] Corn meal