MDCAT Biology MCQ #383

To keep the Calvin cycle running continuously, five molecules of G3P are used to regenerate three molecules of a five-carbon sugar. What is this sugar?

MDCAT Biology MCQ #383

  1. Question 1

    Q1. To keep the Calvin cycle running continuously, five molecules of G3P are used to regenerate three molecules of a five-carbon sugar. What is this sugar?

    • A) Ribulose bisphosphate
    • B) Phosphoglycerate
    • C) Phosphoenolpyruvate
    • D) Oxaloacetate

    Answer: Ribulose bisphosphate

    Explanation: Five G3P molecules are rearranged to form three RuBP molecules; Rubisco is the enzyme, not the sugar being regenerated.