In what way do the membranes of a eukaryotic cell vary?
A) Phospholipids are found only in certain membranes.
B) Certain proteins are unique to each membrane.
C) Only certain membranes of the cell are selectively permeable.
D) Only certain membranes are constructed from amphipathic molecules.
E) Some membranes have hydrophobic surfaces exposed to the cytoplasm, while others have hydrophilic surfaces facing the cytoplasm.

Question

Quizplus · Accepted Answer

Each membrane in a eukaryotic cell contains unique proteins that perform specific functions, such as transport or receptor signaling.

Answer: E
 The phospholipid bilayer of each membrane can have different orientations, resulting in some membranes having hydrophobic surfaces facing the cytoplasm and others having hydrophilic surfaces facing the cytoplasm. This affects the interaction of the membrane with other molecules and the movement of molecules through the membrane.

In What Way Do the Membranes of a Eukaryotic Cell