Question

Which portion of the cell membrane is responsible for preventing unwanted materials from entering the cell? A. integral protein B. glycoprotein C. lipid bilayer D. cholesterol

Answer 1

The correct answer is C. lipid bilayer.

The lipid bilayer is a structural barrier that is the actually boundary of the cell. It is made of two layers of fat separated into 2 separate sheets.

Answer 2

C. lipid bilayer  :) hope this helps!