Microbes in Human Welfare Test

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Microbes in Human Welfare Test - 63

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Weekly Quiz Competition

Question 1
1 / -0

Bactericidal antibiotic is

A
Ofloxacin

B
Chloramycin

C
Erythromycin

D
Tetracycline
Solution
- Antibiotics are commonly classified into bactericidal and bacteriostatic agents based on their antimicrobial action.
- Ofloxacin is a synthetic bactericidal antibiotic that kills bacteria in the body.
- Erythromycin, tetracycline, and chloramphenicol are bacteriostatic antibiotics.
- Bacteriostatic antibiotics are able to limit the growth of bacteria.
Thus, the correct answer is option A.
Question 2
1 / -0

The disease yellow vein mosaic is associated with

A
Apple

B
Ladyfinger

C
Sugarcane

D
Mustard

Solution

Yellow vein mosaic disease is found in okra plants or ladyfinger. The symptoms include alternate green and yellow patches, vein clearing and vein chlorosis of leaves. The yellow network of veins is very conspicuous and vein and veinlets are thickened. In severe cases, the chlorosis may extend to the interveinal area and may result in complete yellowing of leaves. Fruits are dwarfed, malformed and yellow-green.
Question 3
1 / -0

The size of Thiomargarita namibiensis is

A
0.75 mm

B
0.15 mm

C
0.5 mm

D
0.8 mm

Solution

Thiomargarita namibiensis usually attain the size with diameter of 0.1 - 0.3 mm. but sometimes it may grow to the size of 0.75mm.
So, the correct answer is '0.75mm'.
Question 4
1 / -0

Penicillum camemberti is used for ripening of

A
Cheddar cheese

B
Roquefort cheese

C
Camembert cheese

D
All of the above
Solution
- Camembert is a soft and creamy type of cheese. Penicillium camemberti is a species of fungus that form colonies on these cheese which forms a hard and white coloured crust.
- This leads to the ripening of the cheese.
- The fungus is responsible for giving the cheese a particular type of taste.
Thus, the correct answer is option C.
Question 5
1 / -0

Study the following lists.
List-I List-II
(A) Penicillin (I) Glycoprotein
(B) Interferon (II) Meat tenderizer
(C) Cytoplasmic polyhedrosis virus (III) Antibiotic
(D) Protease (IV) Leather softner
(V) Biopesticide
The correct match is

A
(A)- (II), (B)- (IV), (C)- (I), (D)- (V)

B
(A)- (I), (B)- (II), (C)- (III), (D)- (V)

C
(A)- (III), (B)- (I), (C)- (V), (D)- (IV)

D
(A)- (V), (B)- (II), (C)- (IV), (D)- (I)
Question 6
1 / -0

'Flocs' is ?

A
The primary sludge produced in sewage treatment

B
A type of biofortified food

C
A mesh-like structure formed by the association of bacteria and fungal filaments in sewage treatment

D
The effluent in primary treatment tank obtained during sewage treament
Solution
Correct option: C
Explanation:
In sewage treatment, the microbes are used for the reduction of the complex organic matter into simpler organic matter in the sewage water.
The bacterial cells and the filaments of fungal species are combined and associated to form a mesh or network-like structure.
These organisms carry out the reduction of the organic matter and help to reduce the BOD (Biological oxygen demand) of the sewage water.
Hence, A mesh-like structure formed by the association of bacteria and fungal filaments in sewage treatment is the correct answer.
Question 7
1 / -0

The most recently discovered bacteria is

A
Thiomargarita namibiensis

B
Bacillus thuringiensis

C
Pseudomonas putida

D
None of the above

Solution

Thiomargarita namibiensis is the most recently discovered bacteria. This bacteria is found in the ocean sediments. This is the largest bacteria which has been discovered. The size of the bacteria ranges from 100-300 microns. The bacterial cells can be observed with naked eye. The bacterial cells are coccoid and are arranged in chains.
Thus, the correct answer is option A.
Question 8
1 / -0

The roots of some higher plants get associated with a fungal partner. The roots provide food to the fungus while the fungus supplies water to the roots. The structure so formed is known as ______.

A
Lichen

B
Mycorrhiza

C
Anabaena

D
Rhizobium

Solution

Mycorrhiza is the symbiotic association of fungi and the roots of plants where fungus helps in increasing the surface area of absorption for the plants. The mycorrhiza fungi help in the mineral uptake for the plant. The plant provides food in the form of sugars, shelter, and protection to the fungus.
Thus, the correct answer is option B.
Question 9
1 / -0

What is Azathioprine usually used as?

A
Beta blocker

B
Immunosuppressive drug

C
Cryoprotectant

D
None of these

Solution

When the transplantation therapy is used for the treatment of any disease, a new graft is introduced in the host. In order to prevent the rejection of the graft, the immune system of the host is suppressed using drugs. The common immunosuppressive drug is azathioprine. The drug prevents proliferation of the immune cells which participate in the rejection reaction.
Thus, the correct answer is option B.

Question 10

1 / -0

Match the columns and choose the correct combination.

	Column I		Column II
(a)	Escherichia coli	(i)	Nif gene
(b)	Rhizobium melitoti	(ii)	Digest hydrocarbons of crude oil
(c)	Bacillus thuringiensis	(iii)	Human insulin production
(d)	Pseudomonas putida	(iv)	Biocontrol of fungal disease
		(v)	Biodegradable insecticide

(a)-(iii), (b)-(i), (c)-(v), (d)-(iv)

(a)-(i), (b)-(ii), (c)-(iii), (d)-(iv)

(a)-(iii), (b)-(i), (c)-(v), (d)-(ii)

(a)-(ii), (b)-(i), (c)-(iii), (d)-(iv)

(a)-(iv), (b)-(iii), (c)-(i), (d)-(ii)

Solution

a) Human insulin is produced by genetic engineering. In this, the recombinant plasmid which contains the gene for insulin is introduced into the Escherichia coli using recombinant DNA technology. Escherichia coli then synthesizes human insulin in large quantity.

b) Rhizobium melitoti is a gram-negative Rhizobium bacterium. It contains Nif gene. Nif gene encodes enzymes involved in the fixation of atmospheric Nitrogen into Ammonium compound and make it available to plants.

c) Bacillus thuringiensis is a Gram-positive bacteria that is employed to produce biodegradable insecticide. It contains Bt gene which produces protein crystals which are toxic to insects.

d) Pseudomonas putida is a Gram-negative bacterium. It digests hydrocarbons of crude oil. It converts harmful organic solvents into nontoxic biodegradable composites.

Thus, the correct answer is '(a)-(iii), (b)-(i), (c)-(v), (d)-(ii).'

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Microbes in Human Welfare Test - 63

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Microbes in Human Welfare Test - 63

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SHARING IS CARING

Question 1

Ofloxacin

Chloramycin

Erythromycin

Tetracycline

Solution

Question 2

Apple

Ladyfinger

Sugarcane

Mustard

Solution

Question 3

0.75 mm

0.15 mm

0.5 mm

0.8 mm

Solution

Question 4

Cheddar cheese

Roquefort cheese

Camembert cheese

All of the above

Solution

Question 5

(A)- (II), (B)- (IV), (C)- (I), (D)- (V)

(A)- (I), (B)- (II), (C)- (III), (D)- (V)

(A)- (III), (B)- (I), (C)- (V), (D)- (IV)

(A)- (V), (B)- (II), (C)- (IV), (D)- (I)

Question 6

The primary sludge produced in sewage treatment

A type of biofortified food

A mesh-like structure formed by the association of bacteria and fungal filaments in sewage treatment

The effluent in primary treatment tank obtained during sewage treament

Solution

Question 7

Thiomargarita namibiensis

Bacillus thuringiensis

Pseudomonas putida

None of the above

Solution

Question 8

Lichen

Mycorrhiza

Anabaena

Rhizobium

Solution

Question 9

Beta blocker

Immunosuppressive drug

Cryoprotectant

None of these

Solution

Question 10

(a)-(iii), (b)-(i), (c)-(v), (d)-(iv)

(a)-(i), (b)-(ii), (c)-(iii), (d)-(iv)

(a)-(iii), (b)-(i), (c)-(v), (d)-(ii)

(a)-(ii), (b)-(i), (c)-(iii), (d)-(iv)

(a)-(iv), (b)-(iii), (c)-(i), (d)-(ii)

Solution

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