MCQs on Microbes in Human Welfare

MCQs on Microbes in Human Welfare

Which of these processes does not give off CO2?

Lactate fermentation

Aerobic respiration

Alcoholic fermentation

None of the above.

High biological oxygen demand in a water body means ________

Water is not polluted

Water is polluted

Waterbody contains lots of lifeforms

None of the above

The guts of various ruminants contain _________

Acidophiles

Halophiles

Methanogens

All of the above

Which of the following microbes are used for the commercial production of citric acid?

Xanthomonas citri

Asparagine

Asparagus

Aspergillus

Saccharomyces cerevisiae is used primarily for

Baking

Bleaching

Biofuel

None of the above

Acinetobacter baumannii is a _________

Decomposing bacteria

Pathogenic bacteria

Nitrogen-fixing bacteria

None of the above

Ethanol can be produced using __________

Saccharomyces cerevisiae

Escherichia coli

Pseudomonas syringae

None of the above

Bacillus thuringiensis is used for

Fermentation of beer

Biopesticide

Antibiotic

None of the above

Before antibiotics, the first commercial antibacterial available was _____

Penicillin

Prontosil

Azithromycin

None of the above

Example of a natural insect repellant

Citronella oil

Coconut oil

Linseed oil

None of the above

Why is wine distilled?

To reduce toxicity

To enable fermentation

To prevent spoilage

To increase the alcohol percentage

Which of the following is used as a substrate for alcohol fermentation?

Maize

Barley

Sucrose

None of the above

Antibiotics are the most effective on:

Bacteria

Virus

Fungi

None of the above

____________ is a pigment that gives a pinkish hue to rhizobium induced root nodules.

Leghaemoglobin

Carotenoid

Mauveine

None of the above

Bacillus thuringiensis is widely used as:

Insecticide

Weedicides

Rodenticide

None of the above

Answer Key

1- a

2- b

3- c

4- d

5- a

6- b

7- a

8- b

9- b

10- a

11- c

12- c

13- a

14- a

15- a