12th Class Biology Molecular basis of Inheritance / विरासत का आणविक आधार Question Bank Assertion and Reason - Molecular Basis of Inheritance

  • question_answer
    Direction: Each of these questions contains two statements
    Assertion [A] and Reason [R]. Each of these questions also has four alternative choices, any one of which is the correct answer. You have to select one of the codes [a], [b], [c] and [d] given below.
    Assertion [A] S. pneumoniae produce two types of colonies, vi smooth and rough.
    Reason [R] S-type bacteria form smooth colony due to the absence of polysaccharide coat.

    A) Both A and Rare true and R is the correct explanation of A

    B) Both A and R are true, but R is not the correct explanation of A

    C) A is true, but R is false

    D) A is false, but R is true

    Correct Answer: C

    Solution :

    [c] A is true, but R is false because S-type bacteria form a smooth colony because they possess polysaccharide (mucus) coat around themselves, whereas R-type bacteria do not form any covering around themselves.


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