Microbes in Human Welfare Chapter-Wise Test 20

Correct answer Carries: 4.

Wrong Answer Carries: -1.

Which microorganism is used for the production of citric acid on an industrial scale?

Lactobacillus
Aspergillus niger
Acetobacter aceti
Clostridium butylicum
2

Aspergillus niger is a fungus used in the large-scale production of citric acid.

Which of the following statements regarding sewage treatment is incorrect?

Primary treatment removes large solid waste.
Secondary treatment involves aerobic microbes.
Methanogens are involved in secondary treatment.
Tertiary treatment involves physical and chemical purification.
3

Methanogens are involved in anaerobic sludge digestion, not in secondary treatment.

Which fungus is used in the industrial production of cyclosporin A?

Trichoderma polysporum
Aspergillus niger
Penicillium roqueforti
Saccharomyces cerevisiae
1

Trichoderma polysporum produces cyclosporin A, which is used as an immunosuppressant.

Which of the following enzymes is used for dissolving blood clots?

Pectinase
Streptokinase
Lipase
Amylase
2

Streptokinase, produced by Streptococcus bacteria, is used as a clot-busting drug.

Which microorganism is used in the commercial production of acetic acid?

Acetobacter aceti
Lactobacillus
Penicillium
Streptococcus
1

Acetobacter aceti is used in the fermentation process to convert ethanol into acetic acid (vinegar).

Which of the following microbes is involved in the nitrogen-fixation process?

Rhizobium
Saccharomyces cerevisiae
Pseudomonas
Penicillium
1

Rhizobium is a symbiotic nitrogen-fixing bacterium that forms nodules on leguminous plant roots.

Which of the following microbes is used in the fermentation of idli and dosa batter?

Lactobacillus
Pseudomonas
Clostridium
Acetobacter
1

Lactobacillus helps in fermenting idli and dosa batter by producing carbon dioxide, making it fluffy.

Which microorganism is used in the production of antibiotics like tetracycline and streptomycin?

Penicillium
Saccharomyces
Streptomyces
Trichoderma
3

Streptomyces is a genus of bacteria known for producing antibiotics such as tetracycline and streptomycin.

Which of the following microbes is used in the commercial production of acetic acid?

Acetobacter aceti
Lactobacillus
Penicillium
Clostridium
1

Acetobacter aceti is used in vinegar production by converting ethanol into acetic acid.

Which enzyme is used in detergents to break down stains?

Lipase
Pectinase
Amylase
Streptokinase
1

Lipases are used in detergents to break down fats and grease stains.

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