Question

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

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

Answer 1

The correct option is D 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.