BIOMOLECULES AND ENZYMES

Detailed explanation-1: -Carrier proteins and channel proteins are the two major classes of membrane transport proteins. Carrier proteins (also called carriers, permeases, or transporters) bind the specific solute to be transported and undergo a series of conformational changes to transfer the bound solute across the membrane (Figure 11-3).

Detailed explanation-2: -The substances transported by these proteins can include ions such as sodium and potassium; sugars such as glucose; proteins and messenger molecules; and many more.

Detailed explanation-3: -Yes. A transport protein is specific for the substance it translocates, allowing only a certain substance to cross the membrane. For example, a specific water carrier protein in the plasma membrane of red blood cells transports glucose across the membrane.