Question

One of the following is common to glycolysis as well as Krebs cycle in eukaryotes.

• A. Substrate level phosphorylation
• B. Photophosphorylation
• C. Localization in mitochondria
• D. Production of $FAD{H}_2$

Answer 1

The correct option is A Substrate level phosphorylation

• Substrate-level phosphorylation is a metabolic reaction that results in the formation of ATP or GTP by the direct transfer of a phosphoryl (PO3) group to ADP or GDP from another phosphorylated compound.
• The first substrate-level phosphorylation occurs after the conversion of 3-phosphoglyceraldehyde and Pi and NAD+ to 1,3-bisphosphoglycerate via glyceraldehyde 3-phosphate dehydrogenase.
• The second substrate-level phosphorylation occurs by dephosphorylating phosphoenolpyruvate, catalyzed by pyruvate kinase, producing pyruvate and ATP.
• Hence, One of the following is common to glycolysis as well as Krebs cycle in eukaryotes is Substrate level phosphorylation.
• So, the correct answer is 'Substrate level phosphorylation'.