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Questions and Answers
What is the primary function of transport proteins in cellular membranes?
What characteristic distinguishes channel proteins from carrier proteins?
Aquaporins are specialized channel proteins that facilitate the passage of which substance?
How do carrier proteins function to move substances across the cell membrane?
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Which of the following statements about transport proteins is false?
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Study Notes
Transport Proteins
- Facilitate the movement of hydrophilic substances through the cell membrane.
- Each transport protein is specific to a particular substance, ensuring targeted transport.
Channel Proteins
- Feature a hydrophilic channel that provides a passage or tunnel for specific molecules or ions.
- Aquaporins are a type of channel protein specialized for water transport, enhancing the movement of water across membranes.
Carrier Proteins
- Bind to specific molecules, undergoing a conformational change to transport substances across the membrane.
- They work efficiently to shuttle molecules by changing shape, offering a different mechanism compared to channel proteins.
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Description
This quiz explores the role of transport proteins in facilitating the passage of hydrophilic substances across cell membranes. It includes details about channel proteins, such as aquaporins, and carrier proteins that undergo shape changes to shuttle molecules. Test your knowledge on these essential membrane proteins!
