Biochemistry General ca3db324 Which enzyme catalyses substrate level phosphorylation in Kreb's cycle? A ∝ Ketoglutarate dehydrogenase B Succinate thiokinase C Succinate dehydrogenase D Isocitrate dehydrogenase High-Yield Explanation Succinate thiokinase catalyses substrate level phosphorylation of TCA cycle. It is the only enzyme of TCA cycle doing that.