If a solute is moving through a phospholipid bilayer from an area of higher concentration to an area of lower concentration without the assistance of a protein,the manner of transport must be _______.

Question

Quizplus · Accepted Answer

If a solute is moving through a phospholipid bilayer from an area of higher concentration to an area of lower concentration without the assistance of a protein, this is characteristic of simple diffusion. Facilitated diffusion requires the assistance of a protein, while active transport moves molecules against their concentration gradient and requires energy input. The answer D is incorrect since the manner of transport is determined by the solute and its characteristics, but in this scenario, the question is specifically stating that the solute is moving without the assistance of a protein. Answer E is incorrect because a solute can cross the phospholipid bilayer through simple diffusion.

If a Solute Is Moving Through a Phospholipid Bilayer from an Area