Which of the following statements about glycogen is true?
(I)Glycogen is a polymer of glucose in $\alpha$(1$\to$6)linkages with $\alpha$(1$\to$4)linked branches every 8-14 residues.
(II)UDP-glucose is produced from glycogen by the action of the enzyme phosphorylase.
(III)In glycogen breakdown,glucose residues are sequentially removed from the nonreducing ends.
(IV)The breakdown of glycogen in skeletal muscle ultimately supplies glucose-6-phosphate,which can enter glycolysis to generate ATP.
A)I,II,III,IV
B)I,II
C)II,III,IV
D)III,IV
E)III only

Question

Quizplus · Accepted Answer

Statement I is true, as it describes the structure of glycogen. Statement II is false, as UDP-glucose is used to synthesize glycogen, not produced from it. Statement III is true, as glycogen breakdown occurs from the nonreducing ends. Statement IV is true, as the breakdown of glycogen in skeletal muscle ultimately generates glucose-6-phosphate, which can then enter glycolysis to generate ATP. Overall, only statements III and IV are true.

Which of the Following Statements About Glycogen Is True? (I)Glycogen α\alphaα

Which of the Following Statements About Glycogen Is True?
(I)Glycogen $\alpha$