What is the ?G for the inward transport of sodium ions?
For a particular cell at 25°C, the concentration of sucrose is 10 mM on the inside of the cell and 0.5 mM on the outside, whereas the concentration of sodium ions (Na+) is 0.5 mM on the inside of the cell and 10 mM on the outside. The membrane potential is -150 mV.
Constants: R = 1.987 cal/mol-K; T = 25°C = 298 K; F = 23,062 cal/mole-volt
A) +5.233 kcal/mol; an endergonic reaction
B) +5.233 kcal/mol; an exergonic reaction
C) ?5.233 kcal/mol; an endergonic reaction
D) ?5.233 kcal/mol; an exergonic reaction
E) None of the above are correct.
Answer: D
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