Channel proteins allow ions that would not normally pass through the cell membrane to pass through via the channel. What property of the channel proteins is responsible for this? A) A pore of polar amino acid groups B) A pore of hydrophobic amino acid groups C) A pore of Ca²⁺ D) All of the above E) None of the above

Question

Quizplus · Accepted Answer

A pore made up of polar amino acid groups allows ions (which are polar) to pass through the cell membrane via the hydrophilic pathway provided by the polar pore. Hydrophobic amino acid groups would not provide a pathway for ions to pass through. "Ca²⁺" is not a recognized amino acid sequence.

Channel Proteins Allow Ions That Would Not Normally Pass Through