How is a carrier protein different from a channel protein?

carrier proteins can transport ions and molecules via passive transport, facilitated diffusion, or active transport. Most carrier proteins are open to one layer of the membrane at a particular time. They exist in two states, Ping and pong state. In the pong state, the active sites are exposed to the exterior, when the solute bind to he specific sites. Then there's a conformational change. In the ping state the active site are facing the interior of the cell, where the release the solute molecules and revert to the pong state.

In the protein channels, this are like Transmembrane protein, that span the whole bilayer. They are specialized carrier system. The alliance the passage of specified molecules in accordance with the concentration gradient

Carrier proteins are known to be glycoproteins, while channel proteins are lipoproteins.

Explanation:

The carrier proteins and channel proteins are both classes of membrane transport protein. The channel proteins are considered as the class of proteins that give the cell membrane in allowing the flow of molecules to and fro along the concentration gradients, while the carrier proteins, only open to a type of membrane at a particular time.

It should be noted also that, the movement or transportation of substances through membrane is done passively by the channel proteins, while transportation of substances is done both passively by secondary active transport or facilitated diffusion by the carrier proteins.