Exam 18: Storage Mechanisms and Control in Carbohydrate Metabolism

The liver contains a special enzyme, hexokinase, to act as a backup for glucokinase when the glucose levels in the body get very high.

Starting from glucose and UTP and ATP, how many high-energy bonds are broken\consumed to add that glucose to a glycogen molecule?

The enzyme phosphopentose isomerase is characterized by all the following except

Branching and debranching enzymes use the exact same mechanism to add and remove the branches of the glycogen polymer.

Of the various forms of glycogen phosphorylase, the most active would be:

Glycogen phosphorylase

There is as much energy used to add a phosphate group by means of phosphorolysis, as the energy required adding a phosphate using ATP.

In which cellular compartment is pyruvate carboxylase found?

Which of the following occurs when insulin is released?

All of the following sugar rearrangements are part of the pentose phosphate pathway, except .

What is the average chain length of the branches in glycogen?

The regulatory enzymes in gluconeogenesis are

​ Identify the enzyme that catalyzes the growth of glycogen chains.

​ Identify the type of metabolic control mechanism in which the amount of enzyme present is increased by protein synthesis.

Which of the following is NOT a hormone involved in the control of carbohydrate metabolism?

Which of the following statements concerning branched polymers like glycogen is false ?

What kind of enzyme catalyzes the reaction ribulose-5-P ↔ xylulose-5-P?

In addition to pentoses, the pentose phosphate pathway involves sugars of all these sizes except :

Glycogen synthase and glycogen phosphorylase

UDP-glucose pyrophosphorylase works by this mechanism: