Question

The plasma membrane is the boundary between a cell’s internal and external environments. Both the environments are aqueous. To allow the separation of these two aqueous environments, the regions of the plasma membrane indicated in the diagram as (X) and (Y) show which of the following properties?

• A. (X) hydrophilic layers on the outside and (Y) hydrophobic layers on the inside of the membrane
• B. (X) and (Y) are both hydrophobic layers
• C. (X) hydrophobic layers on the outside and (Y) hydrophilic layers on the inside of the membrane
• D. (X) and (Y) are both hydrophilic layers.

Answer 1

Answer: (A)

Correct answer is (a) (X) hydrophilic layers on the outside and (Y) hydrophobic layers on the inside of the membrane