The below diagram shows a typical biogas plant. Which of the following four option, products labelled as A are correctly identified:

1. A - Sludge; B - Methane, Oxygen; C - Dung, water

2. A - Sludge; B - Methane, Carbon dioxide; C - Dung, water

3. A - Sludge; B - Ethylin, Carbon dioxide; C - Dung, water

4. A - Sludge; B - Methane, Carbon dioxide; C - Sewage

Subtopic:  Microbes in Production of Biogas |
 81%
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Column-I

 

Column-II

I.

Streptomyces     

A.    

Nitrogen fixation

II.

Rhizobium

B.

Source of antibiotics

III.   

Nitrosomonas

C.

Vinegar synthesis

IV.

Acetobacter

D.

Nitrification

Which of the combinations is correct?

 

I

II

III

IV

(1)    

B    

A    

D    

C

(2)

C

D

A

B

(3)

A

B

C

D

(4)

D

B

A

C

Subtopic:  Industrial Products, Beverages & Antibiotics | Microbes in Household Products | Microbes as Biofertilizer |
 82%
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  Column-I   Column-II
I. Methanogens A. Microbial biocontrol agent
II. Organic wastes B. Penicillin
III.     Bacillus thuringiensis    
C.     Biochemical oxygen demand
IV. Penicillium notatum D. Methanobacterium

Which of the combinations is correct?

  I II III IV
(1)    B       A       D       C
(2) C D A B
(3) D C A B
(4) D B A C
Subtopic:  Industrial Products, Beverages & Antibiotics | Microbes in Sewage Treatment | Microbes in Production of Biogas | Microbes in Biocontrol Agent |
 94%
From NCERT
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Column-I

 

Column-II

I.

Saccharomyces    

A.    

Bacteria

II.

Trichoderma

B.

Cyanobacteria

III.    

Lactobacillus

C.

Fungi

IV.

Nostoc

D.

Yeast

Which of the combinations is correct?

 

I

II

III

IV

(1)   

D      

C      

A      

B

(2)

C

D

A

B

(3)

A

B

C

D

(4)

D

B

A

C

Subtopic:  Chemistry of Fermented Beverages | Microbes in Household Products | Microbes in Biocontrol Agent | Microbes as Biofertilizer |
 86%
From NCERT
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Column-I

 

Column-II

I.

Statins

A.

Yeast

II.

Ethanol

B.

Blood-cholesterol lowering agent

III.    

Dung

C.

Insect-resistant plant

IV.

Bt-cotton    

D.   

Biogas

Which of the combinations is correct?

 

I

II

III

IV

(1)   

B      

A      

D      

C

(2)

C

D

A

B

(3)

A

B

C

D

(4)

D

B

A

C

Subtopic:  Chemistry of Fermented Beverages | Chemicals, Enzymes & Other Bioactive Molecules | Microbes in Production of Biogas | Microbes in Biocontrol Agent |
 94%
From NCERT
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Following is the sewage treatment. In which of the following options, correct word for all the four numbers (1, 2, 3 and 4) are indicated:

(1) 1 - Large aeration tanks; 2 - Chemically agitation; 3 - High; 4 - Anaerobic

(2) 1 - Large aeration tanks; 2 - Mechanically agitation; 3 - Low; 4 - Anaerobic

(3) 1 - Large aeration tanks; 2 - Mechanically agitation; 3 - Low; 4 - Aerobic

(4) 1 - Large aeration tanks; 2 - Mechanically agitation; 3 - High; 4 - Anaerobic

Subtopic:  Microbes in Sewage Treatment |
 62%
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Following is the curd formation from milk. In which of the following options, correct word for all the two numbers (1 and 2) are indicated:

(1) 1 - Lactic acid; 2 - Increased vitamin B1

(2) 1 - Lactic acid; 2 - Increased vitamin B2

(3) 1 - Lactic acid; 2 - Increased vitamin B12

(4) 1 - Lactic acid; 2 - Increased vitamin C

Subtopic:  Microbes in Household Products |
 96%
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Which of the following statements is correct?

A. Single cell protein is rich in high quality proteins but poor in fat.

B. BOD is the amount of oxygen that would be consumed if all the inorganic matter in one litre of water were oxidized by bacteria.

C. Trichoderma sp are free living fungi that are effective biocontrol agents of several pathogens.

D. Baculoviruses are pathogens that attack insects and other arthropods.

E. Bacillus thuringiensis is first used biopesticide.

F. Lactase enzyme is used in alcoholic fermentation.

G. Mycorrhiza is a symbiotic association between fungi e.g. Glomus and vascular plant.

(1) B, C, F, G

(2) A, D, F

(3) A, C, D, E, G

(4) B, F

Subtopic:  Chemistry of Fermented Beverages | Chemicals, Enzymes & Other Bioactive Molecules | Microbes in Sewage Treatment | Microbes in Biocontrol Agent |
 77%
From NCERT
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Benefits of mycorrhizae are:

A. Resistance to root-borne pathogens

B. Tolerance to salinity and absorption of phosphorus

C. Tolerance to drought

D. Overall increase in the plant growth and development.

(1) Only A, B

(2) Only B, C

(3) Only C, D

(4) A, B, C, D

Subtopic:  Microbes as Biofertilizer |
 86%
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In cheese manufacture, the micro-organisms are used for:

(1) The souring of milk only

(2) The ripening only

(3) Development of resistance to spoilage

(4) Both (1) and (2)

Subtopic:  Microbes in Household Products |
 76%
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