This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Glycolysis, Subject name: Biochemistry
The enzyme NOT involved in substrate level phosphorylation is:- 
Select and explain. 
A. Succinyl thiokinase, B. Phosphofructokinase, C. Pyruvate kinase, D. Phosphoglycerate kinase
B: Phosphofructokinase
Answer: B: Phosphofructokinase 
Explanation: Substrate Level Phosphorylation Definition : Formation of ATP or GTP by direct transfer of phosphoryl group from a substrate to ADP or GDP Enzyme SLP in : Succinate thiokinase Citric acid cycle. Pyruvate kinase Glycolysis Phosphoglycerate kinase Glycolysis Phosphofructokinase (PFK) fructose-6-phosphate- fructose 1,6-bisphosphate use ATP instead of producing it not a SLP