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Chapter 16: Q7CP (page 536)

Question: What is the free energy source for glycogen synthesis?

Short Answer

Expert verified

Answer: UTP (Uridine triphosphate) is the free source for glycogen synthesis.

Step by step solution

01

Definition of UTP.

UTP is defined as a pyrimidineribonucleoside 5'-triphosphate which has uracil as the nucleobase

02

UTP in glycogen synthesis.

A single molecule of UTP is cleaved to UDP for each glucose residue incorporated into glycogen.

Glycogen+Glucose-1-Phosphate+UTP→Glycogen+UDP+2Pi

The amount of UTP is fulfilled through a phosphoryl group transfer reaction mediated by nucleoside diphosphate kinase. The reaction involves the transfer of the phosphate group from adenine triphosphate (ATP) to uridinediphosphate (UDP) to produce UTP.

UDP+ATP→NucleosidediphosphatekinaseUTP+ADP

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Most popular questions from this chapter

Write the balanced equation for the catabolism of six molecules of G6P by the pentose phosphate pathway followed by conversion of ribulose-5-phosphate back to G6P by gluconeogenesis.

Comparisons of wolf and dog DNA reveal that dogs have 4 to 30 amylase genes, whereas wolves have only 2. Why might additional amylase genes have played a role in the domestication of wolves (the ancestors of modern dogs) when humans began farming about 10,000 years ago?

List the metabolic sources and fate of G6P.

Question: Glucose binds to glycogen phosphorylase and competitively inhibits the enzyme. What is the physiological advantage of this?

Glucose binds to glycogen phosphorylase and competitively inhibits the enzyme. What is the physiological advantage of this?
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