Consider a cell membrane at 298K which has glucose at the concentration of 200mM inside the cell and 20 mM outside the cell, wit

Question

3 years ago

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Consider a cell membrane at 298K which has glucose at the concentration of 200mM inside the cell and 20 mM outside the cell, wit

h the voltage being 50 mV lower in the interior. Calculate the molar free energy difference for transporting a glucose molecule from the exterior to the interior of the cell.A. -2.7 kJ/molB. -5.7 kJ/molC. +2.7 kJ/molD. +5.7 kJ/mol

Chemistry

1 answer:

OleMash [197] · Answer 1 · 2022-06-28T08:58:28+03:00

Answer:

D. +5.7 kJ/mol

Explanation:

Molar free energy (ΔG) in the transportation of uncharged molecules as glucse through a cell membrane from the exterior to the interior of the cell is defined as:

ΔG = RT ln C in / C out

knowing R is 8,314472 kJ/molK; T is 298K Cin = 200mM and Cout = 20mM

ΔG = 5,7 kJ/mol

Right answer is:

D. +5.7 kJ/mol

I hope it helps!