Useful and Harmful Microbes — Practice Quiz
Maharashtra Board · Class 9 · Science
Try a 4-question quiz on Useful and Harmful Microbes for Maharashtra Board Class 9 Science: tap an answer to check it and see why.
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Quick Quiz: Useful and Harmful Microbes
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Which microbe is responsible for converting milk into yoghurt?
Rhizobium bacteria live in the root nodules of which type of plants?
What process do yeast cells use to reproduce asexually?
What gas is produced when yeast ferments sugar?
Sample Questions
Which of the following are products of lactobacilli fermentation? (Select all correct answers)
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Yoghurt, Buttermilk, Cheese
Lactobacilli fermentation produces various milk products like yoghurt, buttermilk, and cheese. Bread is made by yeast fermentation, and wine is also produced by yeast.
Antibiotics are obtained from which microorganisms?
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Both bacteria and fungi
Antibiotics are carbon compounds obtained from both bacteria and fungi that can destroy or prevent the growth of harmful microorganisms.
Which scientist discovered penicillin?
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Alexander Fleming
Alexander Fleming discovered penicillin in 1928 when he observed that a fungus (Penicillium) had destroyed bacterial colonies in his laboratory.
Which bacteria causes food poisoning in community feasts?
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Clostridium
Clostridium bacteria spoil cooked food and cause food poisoning. They are anaerobic bacteria that cannot withstand normal oxygen levels.
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