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  4. The given figure shows transport of two molecules A and B through three different modes of facilitated diffusion. Select the correct option regarding I, II and III. I II III

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Q. The given figure shows transport of two molecules A and B through three different modes of facilitated diffusion. Select the correct option regarding I, II and III.
I II IIIBiology Question Image

Transport in Plants

Solution:

During facilitated diffusion some carrier proteins allow transport only if two types of molecules move together. this is called co- transport. It is of two types (i) Symport-both molecules cross the membrane in the same direction at the same time, (ii) Antiport -both molecules move in opposite direction. When a molecule moves across a membrane independent of other molecules the process is called uniport.