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Q.
What is true about the end products of glycolysis?
Respiration in Plants
Solution:
In glycolysis, two molecules of $ATP$ are consumed during two phosphorylation reactions to form fructose $1$, $6-$biphosphate. In return four molecules of $ATP$ are produced by substrate level phosphorylation (conversion of $1$, $3-$biphosphoglycerate to $3-$phosphoglycerate and phosphoenol pyruvate to pyruvate). Two molecules of
$NADH_2$ are formed at the time of oxidation of glyceraldehyde $3-$phosphate to $1$, $3-$biphosphoglycerate. The net reaction of glycolysis is as follows :
Glucose $+ 2NAD^+ + 2ADP + 2H_3PO_4 \to $
$2$ Pyruvate $+ 2NADH + 2H^+ + 2ATP$
Each $NADH$ is equivalent to $3\, ATP$, so the net gain in glycolysis is $8\, ATP$.