the movement molecules in carrier protein?

Question

i do not know the different between carrier protein and pore protein in plasma membrane.

Answer 1

Carrier proteins are membrane proteins that transport a particular substance in the blood or across the cell membrane.
Embedded in the cell membrane these proteins transport substances against the concentration gradient out of or into the cell. Therefore carrier proteins conduct facilitated diffusion and active transport. Each carrier protein is designed to recognize one substance or one group of very similar substances only.Eg.
1.Diffusion of sugars,amino acids,nucleoside.
2.Uptake of glucose.

pore protein
Pores formed by proteins called aquaporins are used to facilitate the movement of water in and out of cells by means of osmosis
Ion channels contain pores to allow ions to pass through the cell's plasma membrane into or out of the cell

Answer 2

Membrane proteins can move within the phospholidid layer and are analogous to logs floating in a lake of phospholipids. This model of a mosaic pattern of proteins ÒfloatingÓ in a fluid lipid bilayer is referred to as the FLUID MOSAIC MODEL The carbohydrates of the membrane are limited and usually associated with the proteins and lipids. If a carbohydrate associates with a lipid it is termed a glycolipid and if the carbohydrate associates with a protein it is termed a glycoprotein.



Carrier proteins are membrane proteins that transport a particular substance in the blood or across the cell membrane.

Embedded in the cell membrane these proteins transport substances against the concentration gradient out of or into the cell. Therefore carrier proteins conduct facilitated diffusion and active transport. Each carrier protein is designed to recognize one substance or one group of very similar substances only. Eg:

1.Diffusion of sugars,amino acids,nucleoside.
2.Uptake of glucose.