Multiple Choice
In the context of the lipid bilayer, which set correctly lists the three main components of a phospholipid?
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8. Membrane Structure
The Lipid Bilayer
Multiple Choice
In the context of the lipid bilayer, what structure forms the outer boundary of most cells?
A
The cell wall, a rigid polysaccharide layer found outside the plasma membrane in plants and many microbes
B
The plasma membrane (cell membrane), a phospholipid bilayer with embedded proteins
C
The cytoskeleton, an internal network of protein filaments that provides structural support
D
The nuclear envelope, a double membrane surrounding the nucleus
Verified step by step guidance1
Understand the components listed in the problem: the cell wall, plasma membrane, cytoskeleton, and nuclear envelope, and their locations relative to the cell.
Recall that the cell wall is an external rigid layer found in plants and some microbes, but not in most animal cells.
Recognize that the cytoskeleton is an internal framework inside the cell, not forming an outer boundary.
Know that the nuclear envelope surrounds the nucleus specifically, not the entire cell.
Identify that the plasma membrane (cell membrane) is the phospholipid bilayer that forms the outer boundary of most cells, controlling what enters and leaves the cell.
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