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

Options

A. If both assertion and reason are true and reason is the correct explanation of assertion
B. If both assertion and reason are true but reason is not the correct explanation of assertion
C. If assertion is true but reason is false
D. If both assertion and reason are false

Answer

b

Explanation

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.
1, 3 bisphosphoglycerate `+ ADP underset(+ Mg^(2))overset("Phosphoglycerate kinase")(hArr)` 3 - phosphoglycerate + ATP