Daily requirements of ATP for sedentary male

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genovese
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Daily requirements of ATP for sedentary male

Post by genovese » Sat Aug 25, 2007 8:37 am

My Biochemisry Text Book states “ A sedentary male 70KG wt. requires 2000Kcal worth of activity. To provide this much energy requires 83Kg of ATP.”

Now, one mol. of ATP hydrolyses to give off 7.3Kcal of energy.

Therefore 2000/7.3= 274 mols. of ATP would be needed to produce 2000Kcal of energy.
I admit that I haven’t worked out the Mol.Wt. of ATP but I cannot imagine how 274 mols. of ATP can weigh 83Kg!

Can anybody help me solve this? I am probably missunderstanding something quite basic but I have puzzled long enough and lost much sleep over this statement.

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mith
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Post by mith » Sat Aug 25, 2007 2:13 pm

274 * 500 = 137 000

Atp is around 500g/mol
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genovese
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Post by genovese » Sat Aug 25, 2007 3:33 pm

Thanks for reply - I need not have lost so much sleep.

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