MCQ Questions on Microbes in Human Welfare

MCQ Questions on Microbes in Human Welfare

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Biology is the study of life. Below, You will find a list of Biology MCQ Questions as per the latest prescribed syllabus. Ace up your preparation with the Objective Questions available on Microbes in Human Welfare and enhance your subject knowledge. Understand the concept clearly by consistently practicing the Multiple Choice Questions and score well in your exams.

MCQ Questions on Microbes in Human Welfare

1. Which of these processes does not give off CO2?
(a) Lactate fermentation
(b) Aerobic respiration
(c) Alcoholic fermentation
(d) None of the above.

Answer

Answer: (a) Lactate fermentation

2. High biological oxygen demand in a water body means ________
(a) Water is not polluted
(b) Water is polluted
(c) Waterbody contains lots of lifeforms
(d) None of the above

Answer

Answer: (b) Water is polluted

3. The guts of various ruminants contain _________
(a) Acidophiles
(b) Halophiles
(c) Methanogens
(d) All of the above

Answer

Answer: (c) Methanogens

4. Which of the following microbes are used for the commercial production of citric acid?
(a) Xanthomonas citri
(b) Asparagine
(c) Asparagus
(d) Aspergillus

Answer

Answer: (d) Aspergillus

5. Saccharomyces cerevisiae is used primarily for
(a) Baking
(b) Bleaching
(c) Biofuel
(d) None of the above

Answer

Answer: (a) Baking

6. Acinetobacter baumannii is a _________
(a) Decomposing bacteria
(b) Pathogenic bacteria
(c) Nitrogen-fixing bacteria
(d) None of the above

Answer

Answer: (b) Pathogenic bacteria

7. Ethanol can be produced using __________
(a) Saccharomyces cerevisiae
(b) Escherichia coli
(c) Pseudomonas syringae
(d) None of the above

Answer

Answer: (a) Saccharomyces cerevisiae

8. Bacillus thuringiensis is used for
(a) Fermentation of beer
(b) Biopesticide
(c) Antibiotic
(d) None of the above

Answer

Answer: (b) Biopesticide

9. Before antibiotics, the first commercial antibacterial available was _____
(a) Penicillin
(b) Prontosil
(c) Azithromycin
(d) None of the above

Answer

Answer: (b) Prontosil

10. Example of a natural insect repellant
(a) Citronella oil
(b) Coconut oil
(c) Linseed oil
(d) None of the above

Answer

Answer: (a) Citronella oil

11. Why is wine distilled?
(a) To reduce toxicity
(b) To enable fermentation
(c) To prevent spoilage
(d) To increase the alcohol percentage

Answer

Answer: (c) To prevent spoilage

12. Which of the following is used as a substrate for alcohol fermentation?
(a) Maize
(b) Barley
(c) Sucrose
(d) None of the above

Answer

Answer: (c) Sucrose

13. Antibiotics are the most effective on:
(a) Bacteria
(b) Virus
(c) Fungi
(d) None of the above

Answer

Answer: (a) Bacteria

14. ____________ is a pigment that gives a pinkish hue to rhizobium induced root nodules.
(a) Leghaemoglobin
(b) Carotenoid
(c) Mauveine
(d) None of the above

Answer

Answer: (a) Leghaemoglobin

15. Bacillus thuringiensis is widely used as:
(a) Insecticide
(b) Weedicides
(c) Rodenticide
(d) None of the above

Answer

Answer: (a) Insecticide

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