Phospholipid bilayers are permeable only to molecules that are _______ and _______.
A) large; uncharged
B) large; charged
C) small; uncharged
D) small; charged

Question

Quizplus · Accepted Answer

Phospholipid bilayers are selectively permeable only to small, uncharged molecules. This is because the lipid bilayer is composed of hydrophobic fatty acid tails that repel charged molecules, while also being too tightly packed together to allow for the passage of larger molecules. Small uncharged molecules, such as oxygen, carbon dioxide, and water, can more easily pass through the membrane.

Phospholipid Bilayers Are Permeable Only to Molecules That Are _______