Option A is correct. For skeletal muscle, there are 37 molecules of ATP produced from one Glucose-6-phosphate derived from glycogen, assuming the presence of the glycerol-3-phosphate shuttle.
1. Contracting skeletal muscle is capable to use a quantity of intra- and extramuscular substrates to generate ATP at some point of exercise. These include creatine phosphate (CP), muscle glycogen, blood-borne glucose, lactate and free fatty acids (FFA), derived from either adipose tissue or intramuscular triglyceride stores.
Aerobic respiratory produces giant amounts of ATP and is an environment friendly capability of making ATP. Up to 38 ATP molecules can be made for every glucose molecule that is damaged down. It is the desired approach of ATP production by body cells.
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