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    Question

    In C4 plants, the first stable product of photosynthesis

    is:
    A Phosphoenolpyruvate Correct Answer Incorrect Answer
    B Oxaloacetate Correct Answer Incorrect Answer
    C Phosphoglyceric acid Correct Answer Incorrect Answer
    D Ribulose Correct Answer Incorrect Answer

    Solution

    In C4 plants, the first stable product of photosynthesis is Oxaloacetate.  C4 plants have a unique carbon fixation mechanism that allows them to minimize photorespiration and improve water-use efficiency in hot and dry environments. In these plants, carbon dioxide is first fixed into a four-carbon compound called oxaloacetate, which is then converted to malate or aspartate.

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