In which of the following steps of the Krebs cycle, substrate level phosphorylation occurs?
Citrate to isocitrate
Alpha-ketoglutarate to succinate
Succinyl Co-A to succinate
Malate to oxaloacetate
CoA is removed from succinyl-CoA to produce succinate. The energy released is used to make guanosine triphosphate (GTP) from guanosine diphosphate (GDP) and Pi by substrate-level phosphorylation. GTP can then be used to make ATP. The enzyme succinyl-CoA synthase catalyzes this reaction of the citric acid cycle.
Hence the correct option is c.