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    science
    Grade-7
    Easy

    Question

    Pyruvate enters the Krebs cycle when oxygen is present. Where does this happen in the eukaryotic cell?

    1. Lysosome
    2. Mitochondria
    3. Chloroplast
    4. Plastid

    Hint:

    Krebs cycle occurs in mitochondrial membrane

    The correct answer is: Mitochondria

      • When oxygen is present,  pyruvate is converted to acetyl coenzyme A 
      • This acetyl coenzyme A then enters the Krebs cycle 
      • Krebs cycle runs in mitochondrial matrix that contains all the required enzymes,  coenzyme and phosphates 

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