Microbes in Human Welfare Chapter-Wise Test 8

Correct answer Carries: 4.

Wrong Answer Carries: -1.

Which of the following microbes is used in the industrial production of butyric acid?

Acetobacter aceti
Clostridium butylicum
Saccharomyces cerevisiae
Pseudomonas
2

Clostridium butylicum is used in the industrial production of butyric acid.

Which microorganism is used in the fermentation of soybeans for making traditional foods?

Rhizopus
Saccharomyces cerevisiae
Pseudomonas
Lactobacillus
1

Rhizopus is used in the fermentation of soybeans to produce tempeh, a traditional food.

Which of the following statements about Bt toxin is incorrect?

Bt toxin is produced by Bacillus thuringiensis.
Bt toxin affects human intestinal cells.
Bt crops have been genetically modified to produce Bt toxin.
Bt toxin becomes active in the alkaline gut of insects.
2

Bacillus thuringiensis toxin specifically targets insect larvae and does not harm humans.

Which of the following processes uses microbes for the large-scale treatment of wastewater?

Fermentation
Sewage treatment
Pasteurization
Bioremediation
2

Microbes play a key role in sewage treatment by breaking down organic matter and reducing BOD.

Which of the following statements about antibiotics is correct?

Streptomycin is produced by Streptococcus.
Penicillin was discovered by Alexander Fleming.
Erythromycin is derived from fungi.
Antibiotics are effective against viral infections.
2

Penicillin was discovered by Alexander Fleming in 1928 and is produced by *Penicillium* fungus.

Which of the following microorganisms is used for the production of vitamin B12?

Aspergillus niger
Pseudomonas
Propionibacterium
Saccharomyces cerevisiae
3

Propionibacterium species are used for the industrial production of vitamin B12.

Which type of microorganism is responsible for the formation of flocs in sewage treatment?

Aerobic bacteria
Methanogens
Cyanobacteria
Anaerobic fungi
1

Aerobic bacteria grow in aeration tanks and form flocs, which help in sewage treatment.

Which of the following microbes is used in the commercial production of vinegar?

Saccharomyces cerevisiae
Acetobacter aceti
Lactobacillus
Penicillium
2

Acetobacter aceti converts ethanol into acetic acid (vinegar).

Which type of microorganism is used in the production of fermented beverages like beer and wine?

Lactobacillus
Saccharomyces cerevisiae
Clostridium
Penicillium
2

Saccharomyces cerevisiae, also known as brewer's yeast, ferments sugars to produce ethanol.

Which bioactive molecule is used as an immunosuppressive agent in organ transplant patients?

Statins
Cyclosporin A
Streptokinase
Penicillin
2

Cyclosporin A, produced by Trichoderma polysporum, is used as an immunosuppressant in transplant patients.

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