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Krebs cycle requires which input from the previous step?
AAcetyl CoA from pyruvate dehydrogenase
BPyruvate from cytoplasmic glycolysis
CGlucose-6-P from hexokinase action
DFructose-1,6-BP from glycolysis
Answer & Solution
Correct answer: A. Acetyl CoA from pyruvate dehydrogenase
Acetyl CoA (from pyruvate dehydrogenase or fatty acid breakdown) enters the TCA cycle by condensing with OAA. Each acetyl CoA generates 3 NADH + 1 FADH2 + 1 GTP/ATP + 2 CO2 per turn.
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