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13 Dec 2019

Adenosine triphosphate (ATP) is used to generate chemical energy in plant and animal cells. The molecular formula for ATP is C10H16N5O13P3. Determine the mass percent composition of ATP.

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Related questions

Adenosine triphosphate (ATP) is the molecular currency of energy in the cell. ATP is hydrolyzed to make adenosine diphosphate (ADP) and inorganic phosphate (Pi) by the following reaction:

ATP + H2O Ã ADP + Pi

For this reaction at 25°C, ΔH°’ = -20. kJ mol-1 and ΔS°’ = +34 J K-1 mol-1. What is ΔG°’? Is the reaction spontaneous under standard conditions?

A critical reaction in the production of energy to do work or drive chemical reactions in biological systems is the hydrolysis of adenosine triphosphate, ATP, to adenosine diphosphate, ADP, as described by

 

for which  = -30.5 kJ/mol at 37°C and pH=7.0.

  1. What is the value of in a biological cell in which [ATP]= 5.0mM, [ADP] = 0.30 mM, and [HPO4^2-] = 5.0 mM?
  2. Is the hydrolysis of ATP spontaneous under these conditions?

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