MDCAT Biology MCQ #344

In yeast cells undergoing anaerobic respiration, pyruvate is converted into acetaldehyde. Which gas is released as a byproduct during this specific step?

MDCAT Biology MCQ #344

  1. Question 1

    Q1. In yeast cells undergoing anaerobic respiration, pyruvate is converted into acetaldehyde. Which gas is released as a byproduct during this specific step?

    • A) Carbon dioxide
    • B) Oxygen
    • C) Methane
    • D) Hydrogen

    Answer: Carbon dioxide

    Explanation: Pyruvate decarboxylase removes CO2 from pyruvate to form acetaldehyde. Lactic acid fermentation is tempting but it involves no carbon loss.