MCAT Question of the Day
    •

    Q:

    		 In the absence of oxygen, pyruvate from glycolysis cannot be further utilized for energy synthesis through the Krebs cycle because
    		 

    A

    		 Oxygen is needed to react with pyruvate and convert it to acetyl CoA

    B

    		 Glycolysis becomes more energetically favorable than the Krebs cycle, thus pyruvate circulates through glycolysis for energy synthesis

    C

    		 There is not NAD+ to react with pyruvate and convert it to acetyl CoA

    D

    		 Oxygen drives the entrance of pyruvate into the Krebs cycle



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