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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Which of the following antibiotics was discovered first?

1. Streptomycin 2. Neomycin
3. Erythromycin 4. Penicillinq
Subtopic:  Industrial Products, Beverages & Antibiotics |
 95%
From NCERT
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Acetic acid is produced by a:

(1) Fungus

(2) Bacterium

(3) Yeast

(4) Virus

Subtopic:  Chemicals, Enzymes & Other Bioactive Molecules |
 74%
From NCERT
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Citric acid is produced by:

(1) Acetobacter aceti (a bacterium)

(2) Yeast (a fungus)

(3) Aspergillus niger (a fungus)

(4) Streptococcus (a bacterium)

Subtopic:  Chemicals, Enzymes & Other Bioactive Molecules |
 88%
From NCERT
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Which of the following bacteria has a role in removing clots from the blood vessels?

1. Bacillus thuringiensis

2. Clostridium butylicum

3. Streptococcus

4. Lactobacillus

Subtopic:  Chemicals, Enzymes & Other Bioactive Molecules |
 93%
From NCERT
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Statins used for lowering blood-cholesterol level are extracted from:

(1) Algae

(2) Bacteria

(3) Virus

(4) Yeast

Subtopic:  Chemicals, Enzymes & Other Bioactive Molecules |
 75%
From NCERT
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The bioactive molecule cyclosporin A is used in:

1. Whooping cough

2. Diphtheria

3. Leprosy

4. Organ-transplant patients

Subtopic:  Chemicals, Enzymes & Other Bioactive Molecules |
 96%
From NCERT
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Cyclosporin A is produced from:

(1) Trichoderma polysporum (a fungus)

(2) Bacillus (a bacterium)

(3) Aspergillus (a fungus)

(4) All of these

Subtopic:  Chemicals, Enzymes & Other Bioactive Molecules |
 95%
From NCERT
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The primary treatment of sewage involves:

1. Digestion

2. Decomposition

3. Sedimentation and filtration

4. None of these

Subtopic:  Microbes in Sewage Treatment |
 96%
From NCERT
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The amount of oxygen required by the microbes in the decomposition of organic matter is called:

1. Chemical oxygen demand

2. Biochemical oxygen demand

3. Total oxygen demand

4. Dissolve oxygen

Subtopic:  Microbes in Sewage Treatment |
 96%
From NCERT
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