MDCAT Biology MCQ #3309

MDCAT Biology MCQ #3309

1. Question 1

   Q1. What is the purpose of the enzyme phosphofructokinase-2 in gluconeogenesis?

   • A) To convert fructose-6-phosphate to fructose-2,6-bisphosphate
   • B) To convert fructose-2,6-bisphosphate to fructose-6-phosphate
   • C) To convert pyruvate to oxaloacetate
   • D) To convert phosphoenolpyruvate to pyruvate

   Answer: To convert fructose-6-phosphate to fructose-2,6-bisphosphate

   Explanation: Phosphofructokinase-2 catalyzes the formation of fructose-2,6-bisphosphate, a potent activator of glycolysis and inhibitor of gluconeogenesis