Multiple Choice
When the cytosolic face of a vesicle membrane fuses with the cytosolic face of the plasma membrane, all of the lipids found in the cytosolic face remain facing the cytoplasm.
8. Membrane Structure
The Lipid Bilayer
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Of the following lipids, which of the following is most rigid?
A
Phospholipids
B
Sphingolipids
C
Glycolipids
D
Steriods
Verified step by step guidance1
Understand the structure of each lipid type: Phospholipids, Sphingolipids, Glycolipids, and Steroids. Each has a unique structure that influences its rigidity.
Phospholipids typically have a glycerol backbone, two fatty acid tails, and a phosphate group, making them flexible and forming bilayers in cell membranes.
Sphingolipids have a sphingosine backbone, a fatty acid, and a polar head group. They are more rigid than phospholipids due to the presence of the sphingosine backbone.
Glycolipids are similar to sphingolipids but have sugar groups attached. Their rigidity is comparable to sphingolipids, but the sugar groups can add some flexibility.
Steroids have a characteristic four-ring structure that is planar and rigid. This structure makes steroids the most rigid among the options provided.
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