Exam 18: Storage Mechanisms and Control in Carbohydrate Metabolism

Which of the following best describes how liver supplies other tissues with the glucose it releases from its stored glycogen?

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

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

When glycogen phosphorylase is phosphorylated

Glycolysis that starts with glycogen instead of glucose can be considered to have a higher energy yield because:

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

Hydrolysis of pyrophosphate is an important energy driving force in the synthesis of glycogen.

Which of the following statements concerning biotin and gluconeogenesis is false?

The NADH used for the reduction reactions during gluconeogenesis usually come from this reaction:

How are the branches in glycogen produced?

The enzyme that catalyzes the interconversion of glucose-1-phosphate and glucose-6-phosphate is

The conversion of ribulose 5-phosphate to xylulose 5-phosphate is

The Cori cycle involves the following:

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

The enzyme glucose-6-phosphatase is only found in cells which have this function or ability:

If you're running away from a bear,

In the Cori cycle

The first reaction of gluconeogenesis is

In the process of substrate cycling