Multiple Choice
In the context of the lipid bilayer, which part of a phospholipid is hydrophobic?
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8. Membrane Structure
The Lipid Bilayer
Multiple Choice
Which class of lipid is the main structural component of most cell membranes, forming the lipid bilayer?
A
Wax esters
B
Steroid hormones (e.g., cortisol)
C
Triacylglycerols (triglycerides)
D
Phospholipids
Verified step by step guidance1
Understand that cell membranes are primarily composed of a lipid bilayer, which provides structural integrity and a barrier between the inside and outside of the cell.
Recall the different classes of lipids: wax esters, steroid hormones, triacylglycerols, and phospholipids, and their general functions in cells.
Recognize that wax esters mainly serve as protective coatings and energy storage, not membrane structure.
Know that steroid hormones like cortisol act as signaling molecules rather than structural components of membranes.
Identify that triacylglycerols are primarily energy storage molecules and do not form bilayers, whereas phospholipids have both hydrophilic heads and hydrophobic tails, allowing them to form the lipid bilayer that is the main structural component of cell membranes.
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