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Q.
State the source of Glyceraldehyde- $3$ -phosphate
NTA AbhyasNTA Abhyas 2020
Solution:
Glycolysis is a catabolic pathway in which a 6-carbon molecule (glucose) is converted into a 3-carbon molecule (pyruvic acid). It occurs in a sequence of 1 0 steps.
It occurs in both aerobic and anaerobic organisms. In the 6th step of glycolysis, the glyceraldehyde 3-phosphate is changed into 1,3-bisphosphoglycerate. The enzyme used in this step is glyceraldehyde 3-phosphate dehydrogenase. It is one of the steps of glycolysis in which energy is formed.
In this step, NAD+ is reduced to NADH by the hydrogen atom released from glyceraldehydes 3-phosphate.
There are two molecules of glyceraldehyde 3-phosphate obtained from one molecule of glucose, so two molecules of NADH are obtained in this step.