Microbes in Human Welfare Test

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Microbes in Human Welfare Test - 48

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Weekly Quiz Competition

Question 1
1 / -0

Which one of the following nitrogen fixing root nodule symbiotic is associated with the trees of Alnus and Casuarinas?

A
Rhizobium

B
Nostoc

C
Anabaena

D
Frankia
Question 2
1 / -0

______ is a non-symbiotic aerobic nitrogen fixer.

A
Rhizobium

B
Nitrobacter

C
Clostridium

D
Psuedomonas
Question 3
1 / -0

Methanogenic bacteria are not found in

A
Rumen of cattle

B
Gobar gas plant

C
Bottom of water-logged paddy fields

D
Activated sludge
Solution
- Methanogenic bacteria (bacteria that produce methane) are not found in activated sludge. Methanogenic bacteria are anaerobic bacteria.
- The microbes found in activated sludge are aerobic bacteria that grow rapidly and form flocs.
- Hence, Methanogenic bacteria are not found in activated sludge.
So, the correct answer is option D.
Question 4
1 / -0

Choose the correct answers from the alternatives given.
A free-living bacterium capable of fixing nitrogen is:

A
Rhizobium

B
Streptococcus

C
Pseudamonas

D
Azotobacter

Solution

The free-living (nonsymbiotic) bacteria are the Cyanobacteria, Anabaena, Nostoc, Azotobacter are capable of nitrogen fixation.
So, the correct option is 'Azotobacter'.
Question 5
1 / -0

Statement 1 : Besides curdling of milk, LAB also improve its nutritional quality by increasing vitamin $$B_{12}$$.
Statement 2 : LAB, when present in human stomach, check disease causing microbes.

A
Both statements 1 and 2 are correct.

B
Statement 1 is correct but statement 2 is incorrect.

C
Statement 1 is incorrect but statement 2 is correct.

D
Both statements 1 and 2 are incorrect.
Solution
LAB (lactic acid bacteria) improves its nutritional quality by increasing vitamin $$B_1$$$$_2$$ besides curdling the milk.
LAB present in curd also checks the expansion of disease-causing microbes in the stomach and other parts of the alimentary canal.
It produces myriad beneficial effects for human beings that include alleviation of lactose intolerance, diarrhea, peptic ulcer, stimulation of immune system, antiallergic effects, antifungal actions, and prevention of colon cancer.
So, the correct option is 'Both statements 1 and 2 are correct'
Question 6
1 / -0

Identify the blank spaces A, B, C and D in the following table and select the correct answer.
Type of microbe Scientific name Commercial product
Bacterium A Streptokinase
B Aspergillus niger Citric acid
Fungus Trichoderma polysporum C
Bacterium D Butyric acid

A
A-Streptococcus, B-Fungus, C-Cyclosporin A, D-Clostridium butylicum

B
A-Clostridium butylicum, B-Streptococcus, C-Fungus, D-Cyclosporin A

C
A-Streptococcus, B-Yeast, C-Cydosporin A, Dlactobacillus

D
A-Streptococcus, B-Cyclosporin A, C-Statins, D-Clostridium butylicum

Solution

Strepokinase is obtained from Streptococcus.
Aspergillus is a fungus.
Tricoderma produces cyclosporin A
Butyric acid is obtained from Clostridium butylicum.
So, the correct answer is ' A-Streptococcus, B-Fungus, c-Cyclosporin A, D- Clostridium butylicum.'
Question 7
1 / -0

Select the correct option to fill up the blanks.
(i) _______ are used in detergent formulations and are helpful in removing oily stains from the laundry.
(ii) _______ are ripened by growing Penicillium roqueforti on them.
(iii) ______ are produced without distillation whereas, are produced by distillation of the fermented broth.
(iv) ______ antibiotic was used to treat American soldiers wounded in world war II.
(v) _______ is also called as kusht rog.

A
(i) Lipases, (ii) Camembert cheese, (iii) Whisky and rum, wine and beer, (iv) Penicillin, (v) Leprosy

B
(I) Lipases, (ii) Roquefort cheese, (iii) Wine and beer, whisky and rum, (iv) Penicillin, (v) Leprosy

C
(i) Streptokinases, (ii) Roquefort cheese, (iii) Wine and beer, whisky and rum, (iv) Streptomycin, (v) Whooping cough

D
(i) Amylases, (ii) Swiss cheese, (iii) Whisky and rum, wine and beer, (iv) Penicillin, (v) Diphtheria

Solution

Lipases are used in detergent formulations and are helpful in removing oily stains from the laundry. Roquefort are ripened by growing Penicillium roqueforti on them. Wine and beer are produced without distillation whereas, whisky and rum are produced by distillation of the fermented broth. Penicillin antibiotic was used to treat American soldiers wounded in world war II. Leprosy is also called as kusht rog.
So, the correct option is '(i) lipases, (ii)Roquefort cheese, (iii)Wine and beer, whisky and rum, (iv) Penicillin, (v)Leprosy'

Question 8

1 / -0

Match different organisms in column I with their uses in column II and select the correct answer from the given codes.

	Column I		Column II
A.	Lactobacillus acidophilus	(i)	Formation of dough
B.	Saccharomyces cerevisiae	(ii)	Single cell proteins
C.	Propionibacterium shermanii	(iii)	Conversion of milk into curd
D.	Spirulina	(iv)	Formation of Swiss cheese

$$A-(iii), B-(i), C-(ii), D-(iv) $$

$$A-(iii), B-(i), C-(iv), D-(ii) $$

$$A-(i), B-(iii), C-(iv), D-(ii)$$

$$A-(i), B-(iii), C-(ii), D-(iv) $$

Solution

Lactobacillus acidophilus convert milk into curd.

Swiss cheese is made with the help of Propionibacterium shermanii .

Saccharomyces cerevisiae helps in the formation of dough.

Spirulina is used as Singla cell protein.

So, the correct option is 'A-(iii), B-(I), C-(iv), D-(ii)'

Question 9
1 / -0

Which one of the following combinations of organisms are responsible for the formation and flavour of yogurt?

A
Lactobacillus bulgaricus and Streptococcus thermophilus

B
Rhizoblum meliloti and Azotobacter

C
Bacillus subtilis and Escherichia coli

D
Bacillus megathermus and Xanthomonas species
Solution
- The main (starter) cultures in yogurt are Lactobacillus bulgaricus and Streptococcus thermophilus.
- The function of the starter cultures is to ferment the lactose (milk sugar) to produce lactic acid.
- The increase in lactic acid decreases pH and causes the milk to clot, or form the soft gel that is characteristic of yogurt.
- The temperature is maintained at about $$45^o C (40^o - 46^o C$$) for four hours.
- It has a flavor of lactic acid and acetaldehyde.
Hence the correct option is A.
Question 10
1 / -0

Which of the following antibiotics was extensively used to treat American soldiers wounded in World War II?

A
Neomycin

B
Bacitracin

C
Chloramphenicol

D
Penicillin

Solution

In 1940, E. Chain and H. Florey obtained a relatively stable preparation of penicillin, which was extensively used to treat wounded American soldiers in World War II.

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Type of microbe	Scientific name	Commercial product
Bacterium	A	Streptokinase
B	Aspergillus niger	Citric acid
Fungus	Trichoderma polysporum	C
Bacterium	D	Butyric acid

Microbes in Human Welfare Test - 48

Result

Microbes in Human Welfare Test - 48

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SHARING IS CARING

Question 1

Rhizobium

Nostoc

Anabaena

Frankia

Question 2

Rhizobium

Nitrobacter

Clostridium

Psuedomonas

Question 3

Rumen of cattle

Gobar gas plant

Bottom of water-logged paddy fields

Activated sludge

Solution

Question 4

Rhizobium

Streptococcus

Pseudamonas

Azotobacter

Solution

Question 5

Both statements 1 and 2 are correct.

Statement 1 is correct but statement 2 is incorrect.

Statement 1 is incorrect but statement 2 is correct.

Both statements 1 and 2 are incorrect.

Solution

Question 6

A-Streptococcus, B-Fungus, C-Cyclosporin A, D-Clostridium butylicum

A-Clostridium butylicum, B-Streptococcus, C-Fungus, D-Cyclosporin A

A-Streptococcus, B-Yeast, C-Cydosporin A, Dlactobacillus

A-Streptococcus, B-Cyclosporin A, C-Statins, D-Clostridium butylicum

Solution

Question 7

(i) Lipases, (ii) Camembert cheese, (iii) Whisky and rum, wine and beer, (iv) Penicillin, (v) Leprosy

(I) Lipases, (ii) Roquefort cheese, (iii) Wine and beer, whisky and rum, (iv) Penicillin, (v) Leprosy

(i) Streptokinases, (ii) Roquefort cheese, (iii) Wine and beer, whisky and rum, (iv) Streptomycin, (v) Whooping cough

(i) Amylases, (ii) Swiss cheese, (iii) Whisky and rum, wine and beer, (iv) Penicillin, (v) Diphtheria

Solution

Question 8

$$A-(iii), B-(i), C-(ii), D-(iv) $$

$$A-(iii), B-(i), C-(iv), D-(ii) $$

$$A-(i), B-(iii), C-(iv), D-(ii)$$

$$A-(i), B-(iii), C-(ii), D-(iv) $$

Solution

Question 9

Lactobacillus bulgaricus and Streptococcus thermophilus

Rhizoblum meliloti and Azotobacter

Bacillus subtilis and Escherichia coli

Bacillus megathermus and Xanthomonas species

Solution

Question 10

Neomycin

Bacitracin

Chloramphenicol

Penicillin

Solution

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