Multiple Choice
In the context of the lipid bilayer, what is the primary purpose of the cell (plasma) membrane?
21
views
8. Membrane Structure
The Lipid Bilayer
Multiple Choice
In the context of the lipid bilayer, what are most cell membranes primarily made of?
A
A phospholipid bilayer with embedded proteins
B
A cellulose matrix reinforced by lignin
C
A double layer of triglycerides coated with glycogen
D
A peptidoglycan layer cross-linked by proteins
Verified step by step guidance1
Understand the structure of cell membranes: Cell membranes are primarily composed of a lipid bilayer that forms a flexible barrier around the cell.
Identify the main lipid component: The lipid bilayer is mainly made up of phospholipids, which have hydrophilic (water-attracting) heads and hydrophobic (water-repelling) tails, allowing them to form a bilayer in aqueous environments.
Recognize the role of proteins: Embedded within this phospholipid bilayer are various proteins that serve functions such as transport, signaling, and structural support.
Eliminate incorrect options: Cellulose and lignin are components of plant cell walls, triglycerides are storage lipids not forming bilayers, and peptidoglycan is found in bacterial cell walls, not membranes.
Conclude that the correct description of most cell membranes is a phospholipid bilayer with embedded proteins.
Related Videos
Related Practice
