객관식
Calculate ΔGtransport for the diffusion of glucose from inside to outside a cell if extracellular [Glucose] = 1 M, intacellular [Glucose] = 2.0 mM, & the temperature = 20˚C. Would this be a spontaneous or nonspontaneous process?
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11. Biological Membranes and Transport
Thermodynamics of Membrane Diffusion: Uncharged Molecule
Multiple Choice
Calculate ΔGtransport for the diffusion of glucose from outside to inside a cell if extracellular [Glucose] = 5 mM, intacellular [Glucose] = 0.5 mM, & the temperature = 20˚C. Would this be an exergonic or endergonic process?
A
–5.61 KJ/mol.
B
5.61 KJ/mol.
C
–0.383 KJ/mol.
D
0.383 KJ/mol.
검증된 단계별 안내1
Identify the formula for calculating the Gibbs free energy change for transport (ΔG_transport): ΔG_transport = RT ln([Glucose]_inside / [Glucose]_outside).
Convert the given temperature from Celsius to Kelvin by adding 273.15 to the Celsius temperature: T(K) = 20 + 273.15.
Use the gas constant R = 8.314 J/(mol·K) for the calculation.
Substitute the values into the formula: R = 8.314 J/(mol·K), T = 293.15 K, [Glucose]_inside = 0.5 mM, and [Glucose]_outside = 5 mM.
Determine if the process is exergonic or endergonic by evaluating the sign of ΔG_transport. A negative ΔG_transport indicates an exergonic process, while a positive ΔG_transport indicates an endergonic process.
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