How do carrier proteins function in the cell membrane?
Understand the Problem
The question is asking about the role and function of carrier proteins in the cell membrane, specifically how they work to transport molecules. It includes options that suggest different functions of carrier proteins, requiring knowledge in cell biology.
Answer
Carrier proteins transport molecules across membranes by binding, changing shape, and releasing them on the other side.
Carrier proteins function by binding specific molecules on one side of the cell membrane, undergoing a conformational change to transport the molecule across the membrane, and then releasing it on the other side.
Answer for screen readers
Carrier proteins function by binding specific molecules on one side of the cell membrane, undergoing a conformational change to transport the molecule across the membrane, and then releasing it on the other side.
More Information
Carrier proteins can be involved in both passive processes like facilitated diffusion, as well as active transport which requires energy. They are integral in maintaining cellular homeostasis by regulating the movement of substances in and out of the cell.
Tips
Avoid confusing carrier proteins with channel proteins; carrier proteins undergo conformational changes while channel proteins do not.
Sources
- Carrier Proteins and Active Membrane Transport - NCBI - ncbi.nlm.nih.gov
- Carrier protein - Definition and Examples - Biology Online Dictionary - biologyonline.com
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