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Question

In glycolysis, during oxidation electrons are removed by:

A
Glyceraldehyde-3-phosphate
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B
NAD+
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C
Molecular oxygen
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D
ATP
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Solution

The correct option is B NAD+

Glycolysis is a multi-step process that takes place in the cytoplasm, in which glucose (a six carbon sugar) is split into two molecules of the three-carbon sugar pyruvate with the generation of two molecules of ATP and two "high energy" electron carrying molecules of NADH.
In the pay-off stage of glycolysis, NAD+ accepts electrons from triose phosphate (Glyceraldehyde-3-phosphate).

Molecular oxygen is the final electron acceptor in the ETC, which helps generate a proton gradient for the synthesis of ATP.


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