Biology · Biophysical Chemistry
Gastric juice (pH 1.5) is produced by pumping H+ from blood plasma (pH 7.4) into the stomach. Calculate the amount of free energy required for H+ transport to produce one litre of gastric juice at 37°C. How many moles of ATP must be hydrolyzed to provide this amount of energy? (The free energy change for ATP hydrolysis under cellular conditions is about -58 kJ/mol, R = 8.315 J/mol/K)
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 117 - 18 kJ/mol and 3.0 - 3.1 mol
- 222 - 23 kJ/mol and 0.3 - 0.31 mol
- 33.4 - 3.6 kJ/mol and 6.0 - 6.1 mol
- 434 - 36 kJ/mol and 0.6 - 0.61 mol✓
Correct answer
34 - 36 kJ/mol and 0.6 - 0.61 mol
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