Question

During complete oxidation of one glucose molecule, the number of ATP molecules obtained by direct substrate level phosphorylation is

• A. 2
• B. 4
• C. 6
• D. 8

Answer 1

Answer: (B)

4

The process of ATP formation is phosphorylation. There is production of ATP from the ADP molecules by the addition of the phosphate group. This is called as substrate level phosphorylation. In the process of glycolysis, there is formation of 4 ATP molecules. There is net gain of 2 ATP molecules because 2 ATP molecules are used in the reaction.

Thus, the correct answer is option B.