MDCAT Biology MCQ #145

In the Calvin cycle, carbon dioxide is fixed to RuBP. What is the first stable 3-carbon compound formed immediately after this fixation?

MDCAT Biology MCQ #145

  1. Question 1

    Q1. In the Calvin cycle, carbon dioxide is fixed to RuBP. What is the first stable 3-carbon compound formed immediately after this fixation?

    • A) 3-phosphoglycerate
    • B) Glyceraldehyde-3-phosphate
    • C) Ribulose bisphosphate
    • D) Oxaloacetate

    Answer: 3-phosphoglycerate

    Explanation: The first stable product in C3 plants is the 3-carbon 3-PGA; G3P is a later intermediate produced after the reduction phase.