You create an artificial vesicle containing a transport protein in its membrane. The transport protein uses...
You create an artificial vesicle containing a transport protein in its membrane. The transport protein uses ATP to pump one Mg2+ ion into the cell for every Na+ ion it pumps out. At the starting point of the experiment, the concentration of Mg2+, Na+, and ATP are the same inside and outside the vesicle.
a) After 1 hour, which ion(s) will be at a higher concentration inside the vesicle?
b) After 1 hour, which ion(s) will be at a higher concentration outside the vesicle?
c) After 1 hour, will a membrane potential be established? Why or why not?
Homework Answers
Ans a: Mg2+ concentration is high inside the vesicle.
Ans b: Na+ concentration is high inside the vesicle.
Ans c: their is no membrane potential is established because it arise between positive ion and negative ion.
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