NEET Biology question
Study the following statements. I. The accumulation of pyruvic acid in the muscle causes fatigue. II. ATP is resynthesized in the muscle by the phosphorylation of ADP by a phosphogen (creatine phosphate), which rephosphorylates ADP to ATP during contraction. III. The Cori cycle recycles lactic acid produced by the muscle: it is carried to the liver, oxidised to pyruvic acid, and resynthesised there into glucose/glycogen, which can return to the muscle. IV. The phosphogen in the vertebrate muscle is arginine phosphate. The correct set of answers for muscle contraction is
Solution
Statement II is correct, since the high-energy phosphagen creatine phosphate rapidly rephosphorylates ADP to ATP during muscle contraction, and statement III is correct, since the Cori cycle recycles the lactic acid produced by muscle glycolysis by carrying it to the liver for reconversion
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