Which example involves a cell membrane receiving and sending messages?
a. a transport protein allows glucose to enter a cell
b. a fox chases a mouse through the forest
c. a cell tells other cells that danger is near
d. a cell membrane allows water to enter the cell

A. A transport protein allows glucose to enter a cell


Cell membranes contain membrane proteins that  allows all the interaction that occurs within the cell. It makes the cell membrane selectively permeable because of its characteristics as being fluid or its fluidity which means to say that they can move freely within the lipid bilayer. The membrane proteins can also be stored in the lipid bilayer together with the enzymes. It cannot be denied that membrane proteins have a lot of functions based on its type. They can be integral proteins, peripheral proteins and lipid bound proteins.

Rna polymeras should attache to the promoter.