Consider the Transport of K⁺ from the Blood (Where Its

question 8

Multiple Choice

Consider the transport of K⁺ from the blood (where its concentration is about 4 mM) into an erythrocyte that contains 150 mM K⁺.The transmembrane potential is about 60 mV,inside negative relative to outside.The free-energy change for this transport process is: (These values may be of use to you: R = 8.315 J/mol^.K;T = 298 K;9 (Faraday constant) = 96,480 J/V;N = 6.022 *10²³/mol. )

• A)about 5 J/mol.
• B)about 15 J/mol.
• C)about 5 kJ/mol.
• D)about 15 kJ/mol.
• E)impossible to calculate with the information given.

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