CPL metabolism

Which of the following enzyme catalyzes the first step of glycolysis?

• Hexokinase

• Pyruvate kinase

• Glucokinase

• Phosphofructokinase-1

Cleavage of Fructose 1, 6-biophosphate yields

• Two aldoses

• Two ketoses

• An aldose and a ketose

• Only a ketose

Dihydroxyacetone phosphate is rapidly and reversibly converted to

• Glyceraldehyde 3-phosphate

• 1, 3-bis-phosphoglycerate

• Fructose 1, 6-bisphosphate

• Fructose 6-phosphate

Dihydroxyacetone phosphate is rapidly and reversibly converted to

• Glyceraldehyde 3-phosphate

• 1, 3-bis-phosphoglycerate

• Fructose 1, 6-bisphosphate

• Fructose 6-phosphate

The breakdown of glycogen to form glucose occurs

• in the liver by phosphorolysis.

• in the muscles by phosphorolysis.

• in the liver by hydrolysis.

• in the muscles by hydrolysis.

• a and b are both correct.

The precursor to glycogen in the glycogen synthase reaction is

• glucose-1-P

• glucose-6-P

• UDP-glucose

• UTP-glucose

• None of the above

Where is the main storage of glycogen

• Liver

• Muscle

• Liver and muscle

• Pancreas

In glycogen, the chains are formed by ____ glycosidic linkages while the branches are ____ glycosidic linkages.

• alpha-1,4/alpha-1,6

• alpha-1,4

• alpha-1,6

• None of these

The key regulatory enzyme in glycogen synthesis is ____.

• Phosphorylase

• Hexokinase

• Glocokinase

• Phosphofructokinase

This hormone leads to glycogen synthesis.

• Glycogenin

• Insulin

• Secretin

• Chymotrypsin