Question

If 23 molecules of glucose are catabolized, how many molecules of ATP are produced (via substrate level phosphorylation) by the TCA cycle? How many FADH2 molecules and NADH molecules are produced by the cycle?​

Answer 1

Answer:

A

If both Assertion & Reason are true and the reason is the correct explanation of the assertion, then mark (1).

B

If both Assertion & Reason are true but the reason is not the correct explanation of the assertion, then mark (2)

C

If Assertion is true statement but Reason is false, then mark (3)

D

If both Assertion and Reason are false statements, then mark (4)

Explanation:Substrate-level phosphorylation is a type of metabolic reaction that results in the formation of Adenosine Triphosphate (ATP) of Guanosine Triphosphat (GTP) by the direct transfer and donation of a phosphoryl (PO3) group to Adenosine Diphosphate (ADP) of Guanosine Diposphate (GDP) from a phosphorylated reactive intermediate.

In glycolysis substrate level phosphorylation occurs in following two reactions

(i) 2molecules of 3-phosphoglyceric acid react with 2 molecules of ADP to from 2 molecules of 3-phosphoglyceric acid and 2 molecules of ATP.

1,3−diphosphoglyceric2 mol eculesacid+2ADP−→−−−−−−−−phosphotransferaseMg2+2−phosphoglyceric2mol eculesacid+2ATP

(ii) 2 mol ecules of phosphoenolpyruvic acid reacts with 2 mol ecules of ADP to from 2 mol ecules of pyruvic acid and 2ATP.

1−phosphoenolpyruvic acid2mol ecules2ADP−→−−−−−−Pyruvic kinaseMg2+Pyruvic acid2mol ecuels+2ATP