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Microbes in Human Welfare Test - 14

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Microbes in Human Welfare Test - 14
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Weekly Quiz Competition
  • Question 1
    1 / -0
    Acellular microorganism is
    Solution
    Virus do not have cells. They possess nucleic acid and a protein coat. 
    So, the correct answer is 'Virus'.
  • Question 2
    1 / -0
    What is the significance of $$CO_{2}$$ in bakery industry?
    Solution
    • In the bakery, the yeasts cells are used for the production of fermented products. 
    • The fermented products produced in the bakery include cake, biscuits, and bread. The yeast cells are added to the dough. 
    • The fungus performs anaerobic fermentation. The fungus utilizes the fermentable sugars and converts them to ethanol and carbon dioxide. 
    • The carbon dioxide gas causes the dough to rise the volume and become soft and fluffy. The carbon dioxide bubbles get trapped in the dough and when baking is done, these bubbles break and form pores. 
    Thus, the correct answer is option D. 
  • Question 3
    1 / -0
    What is the process called due to which idli and dosa makes it fluffy and soft?
    Solution
    Saccharomyces cerevisiae is the fungus that is commonly known as baker's yeast. The yeast cells are added to the batter of idli and dosa. The fungus performs anaerobic fermentation. The fungus utilizes the fermentable sugars and convert them to ethanol and carbon dioxide. The carbon dioxide gas causes the dough to rise and become soft and fluffy. The carbon dioxide bubbles gets trapped in the dough and when baking is done, this bubbles break and forms pores. 
    Thus, the correct answer is option B. 
  • Question 4
    1 / -0
    Cow dung is appropriately used as
    Solution
    Cow dung is available in plenty in India. It is used as manure or pattings for fuel. The cow dung solution has antifungal and insecticide properties. The application of cow dung also improves soil salinity and alkalinity. The presence of this manure helps in better nitrogen fixation through rhizobia.
    So, the correct answer is option A.
  • Question 5
    1 / -0
    Who discovered the biggest bacteria in 1997?
    Solution
    Thiomargarita namibiensis is a Gram-negative coccoid proteobacterium that is large enough to be visible to the naked eyes. It is the largest bacterium discovered by Heide N. Schulz and others in 1997.
  • Question 6
    1 / -0
    Polluted water can be purified by using
    Solution
    • Water pollution due to organic sources like pollution due to sewage can be prevented by treating sewage before passing into the watercourse, in sewage or effluent treatment plants (ETP). 
    • Domestic sewage primarily contains biodegradable organic matter, which readily decomposes by bacteria, algae, and other micro-organisms, which can multiply by using these organic substances as substrates and hence reduce some of the components of sewage. 
    Thus, the correct answer is option D
  • Question 7
    1 / -0
    Which of the following microorganism gives velvety mat-like appearance
    Solution
    Fungi is described as one of the microorganisms which can be observed under the microscope. The structure of the fungi is composed of the mycelium or the hyphae. The hyphae are filamentous and fine thread-like structures. The fungi grow by spreading the hyphae above and inside the substrate. The appearance of the hyphal filaments looks like the velvety mat-like structure. 
    Thus, the correct answer is option D. 

  • Question 8
    1 / -0
    Who is the father of microbiology?
    Solution
    • A microorganism or microbe is an organism that is too small to be seen by the naked eyes of the human being. 
    • They are unicellular as well as multicellular. Some examples of microorganisms are bacteria, fungi, viruses, archaea. The study of the microorganism is called microbiology. 
    • This subject began with the discovery of microorganisms in 1674 by Antonie van Leeuwenhoek.
      Thus the correct answer is option A.
  • Question 9
    1 / -0
    Identify the bacteria that promotes the formation of curd.
    Solution
    • Lactobacillus acts on the lactose of the milk and converts it into lactic acid. The increased acidity causes the milk proteins (casein) to coagulate and form the curd. 
    • Vibrio cholerae bacterium causes cholera infection.
    • Mycobacterium leprae is a bacterium that causes leprosy while tetanus is an infection caused by a bacterium called Clostridium tetani. 

    So, the correct answer is option B.
  • Question 10
    1 / -0
    Methanogens converts
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