Microbes in Human Welfare Test

Result

Microbes in Human Welfare Test - 42

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Weekly Quiz Competition

Question 1
1 / -0

What are used as green manure?

A
Melilotus parviflora

B
Lens esculenta

C
Crotalaria juncea

D
All the above

Solution

Green manures are fertilizers consisting of growing plants that are ploughed back into the soil.All the above are good examples of green manure.
Correct answer-D
Question 2
1 / -0

Azolla is used as biofertilizer as it has

A
Rhizobium

B
Cyanobacteria

C
Mycorrhiza

D
Large quantity of humus
Question 3
1 / -0

Lactic acid bacteria convert milk into curd and improves its nutritional quality by enhancing vitamin

A
A

B
B

C
C

D
D

Solution

Lactic acid causes coagulation of milk protein casein. Milk is changed into curd. Besides the conversion of milk into lactic acid, the LAB also improves quality by increasing vitamin $$B_{12}$$.
Thus, the option B is correct.
Question 4
1 / -0

Find out the pairs which are correctly matched.
a Cyanobacteria $$1$$ Biopesticide
b Mycorrhiza $$2$$ Solubilisation of phosphate
c Bacillus thuringiensis $$3$$ Cry protein
d Single cell protein $$4$$ Rhizobia

A
A and $$2$$

B
B and $$3$$

C
C and $$3$$

D
A and $$3$$

E
B and $$4$$

Solution

Bacillus thuringiensis have Bt toxin encoded by cry genes forming cry proteins.
Correct answer-C
Question 5
1 / -0

A free living nitrogen fixing cyanobacterium which also forms symbiotic association with Azolla is?

A
Anabaena

B
Nostoc

C
Chlorella

D
Tolypothrix

Solution

Azolla forms a symbiotic association with Anabaena for nitrogen fixation.
Correct answer-A
Question 6
1 / -0

Which of the following is used as a green manure?

A
Crotalaria juncea

B
Azolla

C
Hevea braziliensis

D
Azadirachta juncea
Question 7
1 / -0

Which proves to be effective biological control for nematodal pathogens of plants?

A
Pseudomonas cepacia

B
Pisolithus tinctorius

C
Gliocladium virens

D
Paecilomyces lilacinus

Solution

The egg pathogenic fungus Paecilomyces lilacinus is a biocontrol fungus for check from nematodal pathogens of plants.
Correct answer-D
Question 8
1 / -0

Select the correct statement from the following.

A
Methanobacterium is an aerobic bacterium found in rumen of cattle.

B
Biogas commonly called gobar gas is pure methane.

C
Activated sludge sediment in settlement tanks of sewage treatment plant is a rich source of aerobic bacteria.

D
Biogas is produced by the activity of aerobic bacteria on animal waste.

Solution

Methanobacterium is an anaerobic bacterium..
Biogas is a mixture of gases (predominantly methane).
Biogas is produced by the activity of anaerobic bacteria.
Correct answer-C
Question 9
1 / -0

The majority of Baculoviruses are used as biological control agents as.

A
They are species - specific

B
They have no negative impact on nontargets

C
Beneficial insects are being conserved

D
All the above

Solution

Baculoviruses are used as biological control agents and in intrinsic farming because of all these above characteristics.
Correct answer-D
Question 10
1 / -0

Which is a wrong match?

A
Yeast - statins

B
Acetobacter aceti - Acetic acid

C
Aspergillus niger - Citric acid

D
Clostridium butylicum - Lactic acid

Solution

Clostridium butylicum is used to prepare to butyric acid.
Correct answer-D

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a	Cyanobacteria	$$1$$	Biopesticide
b	Mycorrhiza	$$2$$	Solubilisation of phosphate
c	Bacillus thuringiensis	$$3$$	Cry protein
d	Single cell protein	$$4$$	Rhizobia

Microbes in Human Welfare Test - 42

Result

Microbes in Human Welfare Test - 42

Score

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Rank

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SHARING IS CARING

Question 1

Melilotus parviflora

Lens esculenta

Crotalaria juncea

All the above

Solution

Question 2

Rhizobium

Cyanobacteria

Mycorrhiza

Large quantity of humus

Question 3

A

B

C

D

Solution

Question 4

A and $$2$$

B and $$3$$

C and $$3$$

A and $$3$$

B and $$4$$

Solution

Question 5

Anabaena

Nostoc

Chlorella

Tolypothrix

Solution

Question 6

Crotalaria juncea

Azolla

Hevea braziliensis

Azadirachta juncea

Question 7

Pseudomonas cepacia

Pisolithus tinctorius

Gliocladium virens

Paecilomyces lilacinus

Solution

Question 8

Methanobacterium is an aerobic bacterium found in rumen of cattle.

Biogas commonly called gobar gas is pure methane.

Activated sludge sediment in settlement tanks of sewage treatment plant is a rich source of aerobic bacteria.

Biogas is produced by the activity of aerobic bacteria on animal waste.

Solution

Question 9

They are species - specific

They have no negative impact on nontargets

Beneficial insects are being conserved

All the above

Solution

Question 10

Yeast - statins

Acetobacter aceti - Acetic acid

Aspergillus niger - Citric acid

Clostridium butylicum - Lactic acid

Solution

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