Which of the following employs the enzyme phosphoenolpyruvate carboxykinase

Which of the following employs the enzyme phosphoenolpyruvate carboxykinase?
A.  glycolysis
B.  Hexose monophosphate shunt
C.  Krebs cycle
D.  gluconeogenesis
E.  glycogenolysis


In fructose metabolism in the liver, the action of fructokinase on fructose results in the production of
A.  fructose 6-phosphate
B.  fructose 1-phosphate
C.  fructose 1,6-bisphosphate
D.  pentose 6-phosphate + carbon dioxide
E.  None of the above


The activity of which enzyme is controlled by phosphorylation and dephosphorylation of serine residues?
A.  glucokinase
B.  PEP carboxykinase
C.  phosphofructokinase
D.  3-phosphoglyceraldehyde dehydrogenase
E.  glycogen phosphorylase