Question

What is the function of antiporters?

(a) Transfer of the second solute in the same direction

(b) Transfer of the second solute in the opposite direction

(c) Transfer of single solute

(d) Transfer of solute through pores

I had been asked this question in quiz.

Asked question is from Structure of Eukaryotic Cell topic in section Cell Structure and Functions of Life Sciences

Answer 1

Right choice is (b) Transfer of the second solute in the opposite direction

The best I can explain: Antiporters are the co-transporter protein i.e. coupled transport of two solutes in opposite direction.  Example: transport of calcium ion out of cardiac muscle cells.