Phospholipid bilayer membranes are
A) always impermeable to small molecules.
B) always permeable to charged atoms and molecules.
C) differentially permeable.
D) impermeable to all atoms and molecules.

Question

Quizplus · Accepted Answer

Phospholipid bilayer membranes are differentially permeable, meaning they allow certain molecules to pass through while preventing others from passing through. This is due to the nature of the phospholipid molecules that make up the membrane, which form a barrier between the inside and outside of the cell. Small non-polar molecules, such as oxygen and carbon dioxide, can pass through the membrane freely, while larger or charged molecules, such as ions or glucose, require proteins or other mechanisms to facilitate their transport across the membrane.

Phospholipid Bilayer Membranes Are