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Question

Which of the following best describes the structure of the plasma membrane?


A
Proteins sandwiched between two layers of phospholipid.
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B
Proteins embedded in two layers of phospholipid.
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C
A layer of protein coating a layer of phospholipid.
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D
Phospholipids embedded in two layers of protein.
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Solution

The correct option is B Proteins embedded in two layers of phospholipid.
The most widely accepted model for plasma membrane structure is the fluid - mosaic model. According to this model, the plasma membrane is made up of a phospholipid bilayer which has proteins embedded in it. These proteins can be extrinsic or external proteins or intrinsic or internal proteins.

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