Exam 12: Gluconeogenesis, the Pentose Phosphate Pathway, and Glycogen Metabolism

The enzymes transketolase and transaldolase of the pentose phosphate pathway are each very specific for only one substrate.

What is the prosthetic group of transketolase?

Rapidly dividing cells generally have a high pentose phosphate pathway activity.

There are no branched polysaccharide chains in limit dextrin.

What is a cause of cataracts in the eye lens of individuals with diabetes?

The is the site of most gluconeogenesis in mammals.

Glucagon is excreted when blood glucose is high, low), while insulin is secreted when blood glucose is high, low).

Under starvation conditions, about how long does it take in humans for the body to deplete the glycogen store in the liver?

Binding of epinephrine to a₁-adrenergic receptors has what effect?

Any compound that can be converted to can be a precursor for gluconeogenesis.

The interconversion of which pair of substrates is used as a regulatory point in gluconeogenesis?

Under fasting conditions the liver increases its rate of gluconeogenesis to maintain blood glucose levels, but this can only be maintained for a few days before the rate decreases.

Which statement is false about glucagon?

Glucose that is not part of a diet may be provided by degradation of

An intermediate found in gluconeogenesis and not glycolysis is