Which of the following types of molecules may passively diffuse across a membrane?
A) an amino acid in a low pH environment
B) a weak acid in a high pH environment
C) a large polar molecule such as a sugar
D) a small uncharged molecule such as water
E) No molecules can diffuse across a membrane.

Question

Quizplus · Accepted Answer

Small uncharged molecules, such as water, are capable of passive diffusion across a membrane.

Which of the Following Types of Molecules May Passively Diffuse