Which of the following bacteria help in nitrogen fixation from atmosphere?

A. Azotobacter

B. Rhizobium

C. Azospirillum

D. Lactobacillus

(1) A, C, D

(2) A, B, C, D

(3) B, C, D

(4) A, B, C

Subtopic:  Microbes as Biofertilizer |
 89%
From NCERT
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Yeasts have been used for the commercial production of all except:

(1) Wine

(2) Whisky

(3) Ethanol

(4) Curd

Subtopic:  Chemistry of Fermented Beverages |
 85%
From NCERT
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Methanogens are found in:

A. Ethanol

B. Organic acids

C. Anaerobic sludge

D. Rumen of cattle

(1) A, C, D

(2) C, D

(3) B, C, D

(4) A, B

Subtopic:  Microbes in Production of Biogas |
 77%
From NCERT
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The technology of biogas production in India has been developed by the efforts of:

A. Khadi and Village Industries Commision (KVIC)

B. Indian Council of Agricultural Research (IARI)

C. Indian Agricultural Research Institute (IARI)

D. Indian Council of Medical Research (ICMR)

(1) A, C, D

(2) C, D

(3) A, C

(4) A, B

Subtopic:  Microbes in Production of Biogas |
 83%
From NCERT
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Which of the following cyanobacteria can fix atmospheric nitrogen?

A. Nostoc

B. Anabaena

C. Oscillatoria

D. Yeast

1. A, C, D

2. C, D

3. A, C

4. A, B, C

Subtopic:  Microbes as Biofertilizer |
 94%
From NCERT
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Which of the following food items is produced by fermentation by the microbes?

A. Idli

B. Dosa

C. Toddy

D. Cheese

(1) A, B, C, D

(2) C, D

(3) A, C

(4) A, B, C

Subtopic:  Microbes in Household Products |
 84%
From NCERT
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Which industrial products are synthesized from microbes?

A. Antibiotics

B. Fermented beverages

C. Enzymes and chemicals

D. Bioactive molecules

(1) A, C, D

(2) A, B, C, D

(3) A, C

(4) A, B, C

Subtopic:  Industrial Products, Beverages & Antibiotics | Chemicals, Enzymes & Other Bioactive Molecules |
 84%
From NCERT
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The large vessels for growing microbes on an industrial scale are called:

(1) Petri dish

(2) Digestors

(3) Biogas vessel

(4) Fermentors

Subtopic:  Chemistry of Fermented Beverages |
 86%
From NCERT
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Which of the following organisms is used in the production of beverages?

1. Penicillium notatum

2. Saccharomyces cerevisiae

3. Aspergillus niger

4. Clostridium butylicum

Subtopic:  Chemistry of Fermented Beverages |
 95%
From NCERT
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The gas responsible for puffing-up appearance of dough comes from:

(1) Aerobic respiration

(2) Fermentation

(3) Photosynthesis

(4) Photorespiration

Subtopic:  Microbes in Household Products |
 89%
From NCERT
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