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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?
- Lactate fermentation
- Aerobic respiration
- Alcoholic fermentation
- None of the above
Answer: Lactate fermentation
High biological oxygen demand (BOD) in a water body means:
- Water is not polluted
- Water is polluted
- Waterbody contains lots of lifeforms
- None of the above
Answer: Water is polluted
The guts of various ruminants contain:
- Acidophiles
- Halophiles
- Methanogens
- All of the above
Answer: All of the above
Which of the following microbes are used for the commercial production of citric acid?
- Xanthomonas citri
- Asparagine
- Asparagus
- Aspergillus
Answer: Aspergillus
Saccharomyces cerevisiae is used primarily for:
- Baking
- Bleaching
- Biofuel
- None of the above
Answer: Baking
Acinetobacter baumannii is a:
- Decomposing bacteria
- Pathogenic bacteria
- Nitrogen-fixing bacteria
- None of the above
Answer: Pathogenic bacteria
Ethanol can be produced using:
- Saccharomyces cerevisiae
- Escherichia coli
- Pseudomonas syringae
- None of the above
Answer: Saccharomyces cerevisiae
Bacillus thuringiensis is used for:
- Fermentation of beer
- Biopesticide
- Antibiotic
- None of the above
Answer: Biopesticide
Before antibiotics, the first commercial antibacterial available was:
- Penicillin
- Prontosil
- Azithromycin
- None of the above
Answer: Prontosil
Example of a natural insect repellant:
- Citronella oil
- Coconut oil
- Linseed oil
- None of the above
Answer: Citronella oil
Why is wine distilled?
- To reduce toxicity
- To enable fermentation
- To prevent spoilage
- To increase the alcohol percentage
Answer: To increase the alcohol percentage
Which of the following is used as a substrate for alcohol fermentation?
- Maize
- Barley
- Sucrose
- None of the above
Answer: Sucrose
Antibiotics are most effective on:
- Bacteria
- Virus
- Fungi
- None of the above
Answer: Bacteria
____________ is a pigment that gives a pinkish hue to rhizobium induced root nodules.
- Leghaemoglobin
- Carotenoid
- Mauveine
- None of the above
Answer: Leghaemoglobin
Bacillus thuringiensis is widely used as:
- Insecticide
- Weedicides
- Rodenticide
- None of the above
Answer: Insecticide
In Swiss cheese, big holes are made by a:
- Bacterium producing methane gas
- Machine
- Fungus releasing a lot of gases while its metabolic activities
- 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?
- Primary treatment
- Secondary treatment
- Tertiary treatment
- Both (a) and (b)
Answer: Secondary treatment
What does a high value of BOD (Biochemical Oxygen Demand) indicate?
- That water is pure
- That water is less polluted
- That water is highly polluted
- 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:
- Aspergillus
- Clostridium
- Saccharomyces
- Pseudomonas
Answer: Aspergillus
This is not an example of performing biological control of diseases/pests using microbes:
- Trichoderma sp. against some plant pathogens
- Nucleopolyhedrovirus against insects and other arthropods
- Ladybird beetle against aphids
- Bt-cotton to increase yield
Answer: Bt-cotton to increase yield
This is chiefly produced by the activity of anaerobic bacteria on sewage:
- Laughing gas
- Propane
- Mustard gas
- Marsh gas
Answer: Marsh gas
For the production of ethanol, the most common substrate used in distilleries is:
- Soya meal
- Molasses
- Ground gram
- Cornmeal
Answer: Molasses
This is not a biofertilizer:
- Agrobacterium
- Nostoc
- Rhizobium
- Mycorrhiza
Answer: Agrobacterium
Carbon dioxide is not released in which of the following processes?
- Lactate fermentation
- Alcoholic fermentation
- Aerobic respiration in animals
- Aerobic respiration in plants
Answer: Lactate fermentation
Microbes are used in the production of:
- Antibiotics
- Enzymes
- Vitamins
- All of the above
Answer: All of the above
Rhizobium is a nitrogen-fixing bacterium that forms symbiotic relationships with:
- Legumes
- Rice
- Wheat
- Maize
Answer: Legumes
Probiotics are live microorganisms that provide health benefits when consumed. An example of a probiotic is:
- Escherichia coli
- Salmonella typhimurium
- Lactobacillus acidophilus
- Staphylococcus aureus
Answer: Lactobacillus acidophilus
Microbes are used in the production of:
- Cheese
- Yogurt
- Bread
- All of the above
Answer: All of the above
Microbes are used in the treatment of:
- Sewage
- Industrial effluents
- Agricultural waste
- All of the above
Answer: All of the above