Multiple Choice
In the context of the lipid bilayer, which structure primarily controls what goes in and out of the cell?
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8. Membrane Structure
The Lipid Bilayer
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In the context of the lipid bilayer, where is cholesterol primarily located in animal cell membranes?
A
Intercalated between phospholipid molecules within the hydrophobic core of the bilayer, with its hydroxyl group near the polar head groups
B
Confined to the aqueous cytosol, where it forms soluble complexes with phospholipid head groups
C
Covalently attached to the carbohydrate chains of glycoproteins on the extracellular surface
D
Present only in the nucleus, where it stabilizes chromatin by binding directly to DNA
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