Question

multiple choice question
which describes the two layers of phospholipids arranged tail - to - tail that make up the plasma membrane of a cell?

• cholesterol bilayer
• carbohydrate bilayer
• phospholipid bilayer
• protein bilayer

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Explanation:

To determine the correct answer, we analyze each option:

• Cholesterol bilayer: Cholesterol is a component of the cell membrane but does not form the bilayer structure of phospholipids.
• Carbohydrate bilayer: Carbohydrates are present on the cell membrane surface (as glycoproteins or glycolipids) but do not form a bilayer.
• Phospholipid bilayer: The plasma membrane's basic structure is a phospholipid bilayer, where phospholipids are arranged tail - to - tail (hydrophobic tails inward, hydrophilic heads outward).
• Protein bilayer: Proteins are embedded or associated with the phospholipid bilayer but do not form the bilayer themselves.

Answer:

C. Phospholipid bilayer