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  4. Assertion: This conversion of 1, 3-bishosphoglycerate (BPGA) to 3-phosphoglyceric acid (PGA) is an energy yielding step. Reason: This energy is trapped by the formation of ATP.

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Q. Assertion : This conversion of $1$, $3$-bishosphoglycerate $(BPGA)$ to $3$-phosphoglyceric acid $(PGA)$ is an energy yielding step.
Reason : This energy is trapped by the formation of $ATP$.

AIIMSAIIMS 2017Respiration in Plants

Solution:

The conversion of $1$, $3$ - bisphosphoglycerate $(BPGA)$ to $3$ phosphoglyceric acid $(PGA)$ is an energy yielding step. One of the two phosphates of bisphosphoglycerate is linked by high energy bond. It can synthesise $ATP$ and form $3$-phosphoglycerate. The enzyme is phosphoglycerate kinase. The direct synthesis of $ATP$ from metabolites is called substrate level phosphorylation.

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