Which of the following substances is most likely to have the lowest permeability for a lipid bilayer with no protein channels or other transport proteins?

Question

Quizplus · Accepted Answer

The size, charge, and polarity of a substance are important factors in determining its ability to cross a lipid bilayer by passive diffusion. Sodium ions are relatively small and highly charged, making them difficult to pass through the hydrophobic core of the membrane without the aid of transport proteins. Glucose, urea, and water are smaller and more polar, allowing them to cross the membrane more easily. Oxygen is small, nonpolar, and uncharged, making it highly permeable to the membrane.

Which of the Following Substances Is Most Likely to Have