Question

Explain why two turns of the Krebs cycle are needed for each molecule of glucose ?

Answer 1

the molecule that began the Krebs cycle. This molecule is needed for the next turn through the cycle. Two turns are needed because glycolysis produces two pyruvic acid molecules when it splits glucose

Answer 2

Two turns of the Krebs cycle are needed for each molecule of glucose

because glycolysis produces 2 molecules of pyruvate.

• Glycolysis involves conversion of glucose to pyruvate after which it enters into the kreb's cycle to be converted into ATP which is the energy currency of cells.

• Pyruvate is the substrate-compound which enters into the kreb's cycle to form ATP. Since we are dealing with two pyruvates which are products of glycolysis then two turns are needed.

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