MDCAT Biology MCQ #540

A baker uses yeast for bread, while a sprinter's muscles undergo anaerobic respiration. Which byproduct distinguishes the yeast's metabolic pathway?

MDCAT Biology MCQ #540

  1. Question 1

    Q1. A baker uses yeast for bread, while a sprinter's muscles undergo anaerobic respiration. Which byproduct distinguishes the yeast's metabolic pathway?

    • A) The regeneration of NAD+ from NADH
    • B) The net production of two ATP molecules
    • C) The initial breakdown of glucose into pyruvate
    • D) The release of carbon dioxide as a byproduct

    Answer: The release of carbon dioxide as a byproduct

    Explanation: Alcoholic fermentation releases CO2 and ethanol, whereas lactic acid fermentation produces only lactate without releasing any gas.