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

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

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

The large vessels for growing microbes on an industrial scale are called:

The gas responsible for puffing-up appearance of dough comes from:

(1) Aerobic respiration

(2) Fermentation

(3) Photosynthesis

(4) Photorespiration

Which of the following antibiotics was discovered first?
1. Streptomycin
2. Neomycin
3. Erythromycin
4. Penicillin

Acetic acid is produced by a:

(1) Fungus

(2) Bacterium

(3) Yeast

(4) Virus

The bioactive molecule cyclosporin A is used in:

1. Whooping cough

2. Diphtheria

3. Leprosy

4. Organ-transplant patients

The primary treatment of sewage involves:

1. Digestion

2. Decomposition

3. Sedimentation and filtration

4. None of these

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