Physiology Both the liver and muscle contain glycogen, yet, unlike liver, muscle is not capable of contributing glucose to the circulation because muscle: A Does not have the enzyme glucose-6-phosphatase B Glycolytic activity consumes all of the glucose it generates C Does not have the enzyme glucose-1-phosphatase D Does not have the enzyme glycogen phosphorylase 💡 Explanation Both the liver and muscle contain glycogen, yet, unlike liver, muscle is not capable of contributing glucose to the circulation because muscle: ✓ Correct Answer: A. Does not have the enzyme glucose-6-phosphatase