NEET ExamNEET MCQNEET Biology MCQMCQ on Microbes in Human Welfare for NEET

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.

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    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

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