Blood glucose level is not dependent upon muscle glycogen, because of the absence of
A
Phosphorylase
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B
Branching enzyme
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C
Glucose-6-phosphatase
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D
Aldolase
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Solution
The correct option is B Glucose-6-phosphatase Stores of readily available glucose to supply the tissues with an oxidizable energy source are found principally in the liver, as glycogen.
Glycogen is a polymer of glucose residues, linked by (1,4)- and -(1,6)-glycosidic bonds. A second major source of stored glucose is the glycogen of skeletal muscle.
However, muscle glycogen is not generally available to other tissues, because muscle lacks the enzyme glucose-6-phosphatase.
Glucose-6-phosphatase enzyme catalyses the conversion of glucose-6-phosphate to glucose. So, Blood glucose level is not dependent upon muscle glycogen.