The only molecules that can pass freely through the plasma membrane are ones that
A) are positively charged.
B) are small and hydrophobic.
C) are ones that are polar.
D) are small and polar.
E) are small and negatively charged.

Question

Quizplus · Accepted Answer

Small and hydrophobic molecules can pass freely through the plasma membrane because the hydrophobic interior of the membrane repels polar molecules and allows nonpolar molecules to pass through easily.

The Only Molecules That Can Pass Freely Through the Plasma