Active transport uses ATP as the source of energy, takes part in the transport of ions, and can move solutes against the concentration gradient.
• A kind of cellular transport in which components like glucose, ions, and amino acids are mediated across a biological membrane towards the region, which already comprises ample of substances is known as active transport.
• The mechanism of active transport used ATP as the chemical energy to move the substances against their concentration gradient.
• The common regions where active transport takes place are the walls of small intestine and root hair cells.
Thus, the correct answer is all the options.
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