Which statement accurately describes channel proteins? A) They facilitate passive transport only B) They bind to molecules and change shape C) They require energy investment to ope... Which statement accurately describes channel proteins? A) They facilitate passive transport only B) They bind to molecules and change shape C) They require energy investment to operate D) They form hydrophobic channels for ions
Understand the Problem
The question is asking for the correct statement that describes channel proteins, which are integral membrane proteins that help in the movement of ions and molecules across the cell membrane.
Answer
They facilitate passive transport only.
Channel proteins facilitate passive transport only.
Answer for screen readers
Channel proteins facilitate passive transport only.
More Information
Channel proteins create passages for substances to diffuse across the cell membrane without energy input. These proteins are used in passive transport, allowing specific ions or molecules to move down their concentration gradient.
Tips
A common mistake is confusing channel proteins with carrier proteins, which bind substances and can undergo active transport requiring energy.
Sources
- Simple diffusion and passive transport (article) - Khan Academy - khanacademy.org
- Channel Protein | Definition, Function & Examples - Lesson - study.com
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