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The plasma membrane consists mainly of:

1. phospholipids embedded in a protein bilayer
2. proteins embedded in a phospholipid bilayer
3. proteins embedded in a polymer of glucose molecules
4. proteins embedded in a carbohydrate bilayer

Correct answer: proteins embedded in a phospholipid bilayer

Solution

The plasma membrane is primarily a phospholipid bilayer with proteins embedded in it, forming the fluid mosaic structure. This arrangement allows selective permeability, transport, signaling, and structural support.

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