Chapter 7, Problem 11TF

Summary Introduction

Concept introduction:

Active transportis a cellular process in which the proteins present in the cell membrane utilize energy for the movement of ions or molecules across the plasma membrane, against a concentration gradient. After the movement of these ions and molecules, the active transport also restores the concentration gradient.

Active transport proteins contain two sites meant for binding. The other site that is present on the inner side of the plasma membrane is used for binding ATP. This ATP releases energy by breaking bonds between last three phosphate groups in an ATP molecule to form ADP and release a phosphate. This released energy helps the protein to shift shape and allow the movement of ion or molecule across the membrane.