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Question

Which process occurs against a concentration gradient of solute?

A
Diffusion
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B
Osmosis
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C
Transpiration
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D
Translocation
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Solution

The correct option is B Osmosis
Osmosis is defined as the movement of solvent (water) molecules from a region of their high concentration (less concentrated solution) to a region of their low concentration (more concentrated solution) through a semipermeable membrane. In osmosis water is flowing down its concentration gradient, which is opposite to the concentration gradient of the solute.

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