Multiple Choice Questions:

1. Glucose-6-phosphate can serve as:

   A) an intermedicate in glycolysis.
   

   B) a precursor for the synthesis of glycogen.
   

   C) an intermediate in gluconeogenesis.
   

   D) a product of collagen degredation.
   

   E) three of the above
   

   F) all of the above

2. Pyruvate is converted to lactate during anaerobic metabolism. This reaction produces one

   A) ATP.
   

   B) H₂O.
   

   C) FAD.
   

   D) NADH.
   

   E) two of the above.
   

   F) none of the above.

3. Identify the following sugar:
   
   

   A) -D-glucose
   

   B) ß-D-glucose
   

   C) -D-galactose
   

   D) ß-D-galactose
   

   E) -D-fructose
   

   Which of the following statements about pyruvate kinase is true?

   A) active in both glycolysis and gluconeogenesis
   

   B) activated by phosphorylation
   

   C) stimulated by ATP
   

   D) inhibited by fructose-1,6-bisphosphate
   

   E) none of the above are true
   

   Fructose metabolism is not well regulated in the liver because:

   A) fructose-1-phosphate aldolase allows fructose to bypass phosphofructokinase.
   

   B) more ATP is derived from glucose than fructose.
   

   C) more ATP is derived from fructose than glucose.
   

   D) glucose is the preferred substrate for hexokinase.
   

   E) GLUT4 transports glucose, but not fructose into the liver.