Multiple Choice
In the context of the lipid bilayer, what is the primary function of the cell (plasma) membrane?
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8. Membrane Structure
The Lipid Bilayer
Multiple Choice
In the context of the lipid bilayer, what are the two main components of the cell (plasma) membrane?
A
Cellulose and hemicellulose
B
DNA and ribosomes
C
Phospholipids and proteins
D
Triglycerides and glycogen
Verified step by step guidance1
Understand that the cell (plasma) membrane is primarily composed of molecules that form a flexible barrier around the cell, controlling what enters and leaves.
Recall that 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 double layer.
Recognize that proteins are embedded within or attached to this phospholipid bilayer, serving various functions such as transport, signaling, and structural support.
Eliminate options that do not relate to membrane structure: cellulose and hemicellulose are plant cell wall components, DNA and ribosomes are involved in genetic information and protein synthesis, and triglycerides and glycogen are storage molecules, not membrane components.
Conclude that the two main components of the plasma membrane are phospholipids and proteins, which together create a dynamic and functional membrane.
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