MCQ on Microbes in Human Welfare for NEET

Microbes in Human Welfare MCQs

Prepare effectively for NEET with our curated MCQ on Microbes in Human Welfare. This set of Microbes in Human Welfare MCQ questions is designed to deepen your understanding of the role microbes play in various aspects of human life, including health, agriculture, and industry.

Our collection includes Microbes in Human Welfare MCQ with answers, providing not only the questions but also detailed explanations to help clarify complex concepts. By practicing these MCQs for NEET, you can improve your grasp of key topics and enhance your problem-solving skills.

Whether you’re revising for the NEET exam or seeking to strengthen your knowledge in microbiology, these Microbes in Human Welfare MCQ questions and answers are a valuable resource for effective exam preparation and boosting your confidence.

Microbes in Human Welfare MCQs with Answers

Here are 30 Microbes in Human Welfare MCQ questions and answers:

Which of these processes does not give off CO2?

1. Lactate fermentation
2. Aerobic respiration
3. Alcoholic fermentation
4. None of the above

Answer: Lactate fermentation

High biological oxygen demand (BOD) in a water body means:

1. Water is not polluted
2. Water is polluted
3. Waterbody contains lots of lifeforms
4. None of the above

Answer: Water is polluted

The guts of various ruminants contain:

1. Acidophiles
2. Halophiles
3. Methanogens
4. All of the above

Answer: All of the above

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

1. Xanthomonas citri
2. Asparagine
3. Asparagus
4. Aspergillus

Answer: Aspergillus

Saccharomyces cerevisiae is used primarily for:

1. Baking
2. Bleaching
3. Biofuel
4. None of the above

Answer: Baking

Acinetobacter baumannii is a:

1. Decomposing bacteria
2. Pathogenic bacteria
3. Nitrogen-fixing bacteria
4. None of the above

Answer: Pathogenic bacteria

Ethanol can be produced using:

1. Saccharomyces cerevisiae
2. Escherichia coli
3. Pseudomonas syringae
4. None of the above

Answer: Saccharomyces cerevisiae

Bacillus thuringiensis is used for:

1. Fermentation of beer
2. Biopesticide
3. Antibiotic
4. None of the above

Answer: Biopesticide

Before antibiotics, the first commercial antibacterial available was:

1. Penicillin
2. Prontosil
3. Azithromycin
4. None of the above

Answer: Prontosil

Example of a natural insect repellant:

1. Citronella oil
2. Coconut oil
3. Linseed oil
4. None of the above

Answer: Citronella oil

Why is wine distilled?

1. To reduce toxicity
2. To enable fermentation
3. To prevent spoilage
4. To increase the alcohol percentage

Answer: To increase the alcohol percentage
Which of the following is used as a substrate for alcohol fermentation?

1. Maize
2. Barley
3. Sucrose
4. None of the above

Answer: Sucrose

Antibiotics are most effective on:

1. Bacteria
2. Virus
3. Fungi
4. None of the above

Answer: Bacteria

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

1. Leghaemoglobin
2. Carotenoid
3. Mauveine
4. None of the above

Answer: Leghaemoglobin

Bacillus thuringiensis is widely used as:

1. Insecticide
2. Weedicides
3. Rodenticide
4. None of the above

Answer: Insecticide

In Swiss cheese, big holes are made by a:

1. Bacterium producing methane gas
2. Machine
3. Fungus releasing a lot of gases while its metabolic activities
4. Bacterium producing large quantities of carbon dioxide

Answer: Bacterium producing large quantities of carbon dioxide

During which stage of sewage water purification are microbes used?

1. Primary treatment
2. Secondary treatment
3. Tertiary treatment
4. Both (a) and (b)

Answer: Secondary treatment

What does a high value of BOD (Biochemical Oxygen Demand) indicate?

1. That water is pure
2. That water is less polluted
3. That water is highly polluted
4. That consumption of organic matter by microbes is higher in the water

Answer: That water is highly polluted

This is a good producer of citric acid:

1. Aspergillus
2. Clostridium
3. Saccharomyces
4. Pseudomonas

Answer: Aspergillus

This is not an example of performing biological control of diseases/pests using microbes:

1. Trichoderma sp. against some plant pathogens
2. Nucleopolyhedrovirus against insects and other arthropods
3. Ladybird beetle against aphids
4. Bt-cotton to increase yield

Answer: Bt-cotton to increase yield

This is chiefly produced by the activity of anaerobic bacteria on sewage:

1. Laughing gas
2. Propane
3. Mustard gas
4. Marsh gas

Answer: Marsh gas

For the production of ethanol, the most common substrate used in distilleries is:

1. Soya meal
2. Molasses
3. Ground gram
4. Cornmeal

Answer: Molasses

This is not a biofertilizer:

1. Agrobacterium
2. Nostoc
3. Rhizobium
4. Mycorrhiza

Answer: Agrobacterium

Carbon dioxide is not released in which of the following processes?

1. Lactate fermentation
2. Alcoholic fermentation
3. Aerobic respiration in animals
4. Aerobic respiration in plants

Answer: Lactate fermentation

Microbes are used in the production of:

1. Antibiotics
2. Enzymes
3. Vitamins
4. All of the above

Answer: All of the above

Rhizobium is a nitrogen-fixing bacterium that forms symbiotic relationships with:

1. Legumes
2. Rice
3. Wheat
4. Maize

Answer: Legumes

Probiotics are live microorganisms that provide health benefits when consumed. An example of a probiotic is:

1. Escherichia coli
2. Salmonella typhimurium
3. Lactobacillus acidophilus
4. Staphylococcus aureus

Answer: Lactobacillus acidophilus

Microbes are used in the production of:

1. Cheese
2. Yogurt
3. Bread
4. All of the above

Answer: All of the above

Microbes are used in the treatment of:

1. Sewage
2. Industrial effluents
3. Agricultural waste
4. All of the above

Answer: All of the above