Which enzyme catalyses substrate level phosphorylation in Kreb's cycle?: (A) ∝ Ketoglutarate dehydrogenase, (B) Succinate thiokinase, (C) Succinate dehydrogenase, (D) Isocitrate dehydrogenase
Answer is B. Succinate thiokinase catalyses substrate level phosphorylation of TCA cycle. It is the only enzyme of TCA cycle doing that.