Question

The phospholipid bilayer is made up of

• A. Sugars and phosphoproteins
• B. Proteins and phospholipids
• C. Phosphoproteins and lipids
• D. DNA and carbohydrates
• E. PhosphoDNA and lipids

Answer 1

Answer: (B)

Proteins and phospholipids

Plasma membrane is the outer layer of the cell. It is composed of a bilayer of phospholipids with the phosphate groups on the surface and lipids embedded inside the membrane. Also, several proteins are interspersed in the membrane like a mosaic. Integral membrane proteins traverse the entire width of the membrane while surface proteins are present only on the surface.

Thus, the correct answer is option 'Proteins and phospholipids'.