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7th Class Science Respiration in Organisms Question Bank Respiration In Plants And Animals

  • question_answer
    DIRECTIONS: Carefully observe pictures given below and answer the following questions. In the test-tubes 'A' and 'B' shown below, yeast was kept in sugar solution. The products of respiration expected in tube 'A' are

    A) Ethanol and carbon dioxide

    B) Carbon dioxide and water

    C) Lactic acid

    D) None of these

    Correct Answer: A

    Solution :

    In test-tube 'A' due to oil-film, oxygen is absent and the products of respiration will be ethanol (i.e. alcohol) and carbon dioxide. It is anaerobic respiration.


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