This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Carbohydrates, Subject name: Biochemistry
The immediate degradation of glycogen under normal conditions gives rise to which one of the following? 
Select and explain. 
A. More glucose than glucose-1-phosphate, B. More glucose-1-phosphate than glucose, C. Equal amounts of glucose and glucose-1-phosphate, D. Neither glucose nor glucose-1-phosphate
B: More glucose-1-phosphate than glucose
Answer: B: More glucose-1-phosphate than glucose 
Explanation: Phosphorylase produces glucose-1-phosphate from glucose residues linked a-1,4. Free glucose is produced from a-1,6-linked residues at branch points by an a-1,6-glucosidase activity of the debranching enzyme. Degradation of glycogen produces glucose-1-phosphate and glucose in about a 10:1 ratio, which is the ratio of the a-1,4 linkages to a-1,6 linkages.