Which of the following metabolic enzymes uses GTP instead of

Which of the following metabolic enzymes uses GTP instead of ATP as the source of phosphoryl transfer?

a. Pyruvate carboxylase

b. None of the choices listed

c. Phosphoglycerate mutase

d. Glyceraldehyde dehydrogenase

e. PEP carboxykinase

Solution

Answer e: Enzyme phosphoenol pyruvate carboxykinase ( PEP carboxykinase) uses GTP instead of ATP in the following reaction

                                    PEP carboxykinase

Oxaloacetate + GTP -------------------------------------- PEP ( Phosphenol pyruvate ) + CO2 + GDP

Hence answer e is correct