NEET Biology Photosynthesis in Higher Plants Question Bank Dark Reaction

  • question_answer
    In dark reaction, first reaction is the

    A) Carboxylation

    B) Decarboxylation

    C) Dehydrogenation

    D) Deamidation

    Correct Answer: A

    Solution :

    Addition of carbon dioxide in to a compound is called carboxylation. Carboxylation is a first reaction of dark reaction. 6 Ribulose-1, 5 biphosphate + 6 CO2 +6H2O \[\underset{RuBP\,\text{carboxylatase}}{\mathop{\xrightarrow{\text{Carboxydimutatase}}}}\,\]\[\underset{(12\,mols)}{\mathop{3\text{phospholglyceric}}}\,\,\text{acid}\] 1, 3 biphosphoglycoric acid +12 NADP.2H \[\xrightarrow{\text{Triose}\,\text{phosphate}\,\text{dehydrogenase}}3\text{ }phosphoglyceraldehyde\text{ }+\text{ }12NAD{{P}^{+}}+\text{ }12{{H}_{3}}P{{O}_{4}}.\]


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