The phenomenon of uptake of water at the expense of energy by the cell and usually against the osmotic gradient is known as
A
Active absorption
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B
Passive absorption
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C
Osmosis
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D
Diffusion
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Solution
The correct option is A Active absorption The phenomenon of uptake of water at the expense of energy by the cell and usually against the osmotic gradient is known as active absorption. In this, molecules move against the concentration gradient. i.e. from the region of their lower concentration to the region of their higher concentration using energy in the form of ATP.