The enzyme not involved in substrate level phosphorylation is:: (A) Succinyl thiokinase, (B) Phosphofructokinase, (C) Pyruvate kinase, (D) Phosphoglycerate kinase
Answer is B. (Refer: Harper’s Illustrated Biochemistry, 27th edition, pg no: 172 – 185)
Oxidative phosphorylation

The energy released as a result of biological oxidation is trapped in the form of higher energy phosphate bonds in ATP by phosphorylation of ADP.