This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Biochemistry
Enzyme involved in gluconeogenesis are all except: 
Select and explain. 
A. Pyruvate carboxylase, B. PEP carboxykinase, C. Pyruvate kinase, D. Glucose-6-phosphatase
C: Pyruvate kinase
Answer: C: Pyruvate kinase 
Explanation: Answer-c- Pyruvate kinaseMitochondrial pyruvate carboxylase catalyzes the carboxylation of Pyruvate to Oxaloacetate, It is an ATP-requiring reaction, Biotin is the coenzyme.Phosphoenolpyruvate Carboxykinase: Catalyzes the decarboxylation and phosphorylation of oxaloacetate to phosphoenolpyruvate(PEPCK) (Cytosol) using GTP as the phosphate donor.The conversion of glucose-6-phosphate to glucose is catalyzed by glucose 6-phosphatase