Active Transport
Cell Biology
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Membrane Transport
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Passage Across the Cell Membrane
Q. Which of the following is a symporter?
a
A transporter that uses ATP to transport Na+ against its electrochemical gradient.
b
A transporter that harnesses the energy of Na+ moving down its concentration gradient, to move Ca++ against its concentration gradient in the opposite direction.
c
A channel that allows Na+ to move down its concentration gradient.
d
A transporter that harnesses the energy of Na+ moving down its concentration gradient, to move Ca++ against its concentration gradient in the same direction.
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