STANDARD Botany Krebs Cycle MCQ Question
Which of these steps in Kreb's cycle indicates substrate level phosphorylation
Conversion of succinic acid to α-ketoglutaric acid
Conversion of succinic acid to malic acid
Conversion of succinyl CoA to succinic acid
Conversion of malic acid to oxalo acetic acid
Correct Answer
Detailed Explanation
Succinate thiokinase catalyzes the conversion of succinyl CoA to succinic acid. During this step, CoA is released and one molecule of GTP is formed from GDP. This is a substrate level phosphorylation. GTP is converted to GDP with the simultaneous synthesis of ATP from GDP.
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