AP BIOLOGY

Detailed explanation-1: -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). Channel proteins, in contrast, interact with the solute to be transported much more weakly.

Detailed explanation-2: -The major difference between a channel protein and a carrier protein is stereospecificity. While channel proteins only allow certain sized molecules to pass, they do not bind the molecules. Carrier proteins have an active site, which the chemical to be transported must bind to.

Detailed explanation-3: -Carrier proteins bind to the substances they transport across the membrane via facilitated diffusion, whereas channel proteins provide a pore for substances to move across the membrane via facilitated diffusion.

Detailed explanation-4: -A transport protein completely spans the membrane, and allows certain molecules or ions to diffuse across the membrane. Channel proteins, gated channel proteins, and carrier proteins are three types of transport proteins that are involved in facilitated diffusion.

Detailed explanation-5: -Carrier proteins are proteins with hydrophilic pore that allows specific ions to pass. through membrane and they not require energy for it, whereas channel proteins are. proteins which allow larger or polar molecules to pass through the membrane and. they require energy for it.