NEET Biology Photosynthesis in Higher Plants Question Bank Assertion and Reason

  • question_answer
    Assertion : Each molecule of ribulose-1, 5-bisphosphate fixes one molecule of\[C{{O}_{2}}\]. Reason : Three molecules of NADPH and two ATP are required for fixation of one molecule of\[C{{O}_{2}}\].

    A) If both the assertion and the reason are true and the reason is a correct explanation of the assertion

    B) If both the assertion and reason are true but the reason is not a correct explanation of the assertion 

    C) If the assertion is true but the reason is false

    D) If both the assertion and reason are false

    E) If the assertion is false but reason is true

    Correct Answer: C

    Solution :

    Each molecule of ribulose-1, 5-biphosphate fixes one molecule of carbon dioxide with the addition of water, thereby resulting in the formation of two molecules of 3-phosphoglyceric acid (3-PGA). The fixation and reduction of one molecule of\[C{{O}_{2}}\]requires three molecules of ATP and two of NADPH, coming from the photochemical reactions.


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