Question

What is active transport?

Answer 1

Active transport is the movement of molecules across a membrane from a region of their lower concentration to a region of their higher concentration.

Explanation:

This movement occurs in the direction against some gradient or other obstructing factor. It uses chemical energy to move molecules against a gradient, polar repulsion or other resistance.

It is associated with accumulating high concentration of molecules that the cell needs such as ions, glucose and amino acids.

Examples of active transport includes the uptake of glucose in the intestines in humans and the uptake of mineral ions into root hair cells of plants.