Biology

Based on the diagram, the correct answer is: D.Channel protein

Here’s why:

Channel proteins are a type of membrane protein that span the entire membrane, extending across the phospholipid bilayer. These proteins create channels or pores that allow ions, molecules, or other substances to pass through the membrane. They typically form hydrophilic channels that allow water-soluble substances to move through the otherwise hydrophobic interior of the lipid bilayer.

Why the other options are incorrect:

A.Cholesterol: Cholesterol molecules are not proteins and do not span the entire phospholipid bilayer. Instead, they are embedded within the ...