MDCAT Biology MCQ #370

In the Krebs cycle, which of the following oxidative steps does NOT involve the release of a carbon dioxide molecule?

MDCAT Biology MCQ #370

  1. Question 1

    Q1. In the Krebs cycle, which of the following oxidative steps does NOT involve the release of a carbon dioxide molecule?

    • A) Isocitrate to alpha-ketoglutarate
    • B) Alpha-ketoglutarate to Succinyl-CoA
    • C) Pyruvate to Acetyl-CoA
    • D) Malate to Oxaloacetate

    Answer: Malate to Oxaloacetate

    Explanation: Isocitrate and alpha-ketoglutarate are the steps where CO2 is released. Malate to Oxaloacetate (Option D) involves oxidation via NAD+ only.