Compartments a and B Are Separated by a Membrane That

question 113

Multiple Choice

Compartments A and B are separated by a membrane that is permeable to K+ but not to Cl-.At time zero,a solution of KCl is poured into compartment A and pure H2O is poured into compartment B.Now they are emptied and the membrane replaced with one that is permeable to both K+ and Cl-,but no other ions.At time zero,a solution of NaCl is poured into compartment A and a solution of KA (A is an anion other than Cl-) is poured into compartment B.At equilibrium,

• A)Compartment A will be negatively charged relative to B
• B)There is a net flux of K+ from B to A
• C)There is a concentration gradient favoring Cl- diffusion from A to B and this gradient is balanced by an electric force favoring diffusion from B to A
• D)Both there is a net flux of K+ from B to A and there is a concentration gradient favoring Cl- diffusion from A to B and this gradient is balanced by an electric force favoring diffusion from B to A are correct
• E)All of the choices are correct

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