Which Is a Correct Association of Protein Types

Multiple Choice

Which is a correct association of protein types?

A) carrier proteins-provide a channel for substances to move across a membrane
B) cell recognition proteins-allow a specific molecule to bind to it and may cause a cell response
C) channel proteins-combine with a substance to help it move across a membrane
D) receptor proteins-variations in these proteins cause tissue transplant rejection
E) enzymatic proteins-carry out metabolic reactions directly