Question

how are atp molecules formed????

Answer 1

heyaa,,
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When a cell has energy available it stores small amounts of it by adding a phosphate group to ADP. then atp molecules get formed.
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Answer 2

Although not the preferred method of producing ATP, the body uses this when carbohydrate is not available. Lipid metabolism is one of the main ways that the body's glycogen (glucose stored in the liver and muscles) store is replenished after exercise.  ATP Phosphocreatine- the fastest source of energy.