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Biology MCQs with Answers

This is Biology MCQs section with detailed explanations for preparation of screening tests, interviews for government jobs. In this section candidate will learn MCQs on variety of topics from the subject.

  1. 1 The milk streptococci produce acetoin that gets spontaneously oxidized yielding a flavorings agent (responsible for aroma of butter) that is
    1. acetone

    2. acetyl coA

    3. butyric acid

    4. diacetyl

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  2. 2 Staphylococcal intoxication is caused by the toxin m the food from
    1. Staphylococcus aureus

    2. S. cerevisiae

    3. S. thermophillus

    4. none of these

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  3. 3 The botulism intoxication occurs due to
    1. an enterotoxin

    2. neurotoxin

    3. mycotoxin

    4. all of these

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  4. 4 The Bacillus cereus causes gasteroenteritis by the production of an exoenterotoxin which is released in food as a result of
    1. cell growth

    2. cell autolysis

    3. cell permeation

    4. cell damage

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  5. 5 Arrange the potencies of toxin in descending order of the following canned foods
  6. 6 The application of Gamma rays destroys botulism toxin. The dose of gamma rays required for this purpose is
    1. 73 Gy

    2. 73 Rad

    3. 7.3 Mrad

    4. 173 Rad

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  7. 7 Group I C. botulinum strains generally includes in
  8. 8 Salmonellois is caused by the
  9. 9 Which of the following is true to prevent botulism from smoked fish?
  10. 10 The method of successful treatment of botulism prior to appearance of botulism symptoms involve administration of
    1. antibiotic

    2. analgesic

    3. antitoxin

    4. antipyretic

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