Pregunta
Which type of membrane protein is involved in both active transport and facilitated transport? A) carrier B) cytoskeletal (C) structural (D) targeted (E) enzymatic
Ask by Chen Bowen. in the United States
Feb 20,2025
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The membrane protein involved in both active transport and facilitated transport is the **carrier** protein.
Solución
The type of membrane protein involved in both active transport and facilitated transport is:
A) carrier
**Explanation:**
- **Carrier proteins** are integral membrane proteins that bind to specific molecules and change shape to shuttle them across the membrane. They can facilitate passive transport (facilitated diffusion) as well as active transport, where energy is required to move substances against their concentration gradient.
- Other options like cytoskeletal, structural, targeted, and enzymatic proteins do not primarily function in both types of transport.
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A carrier protein is your go-to here! These versatile membrane proteins play a crucial role in both active transport, where they move substances against their concentration gradient using energy (think of it as a 24/7 delivery service), and facilitated transport, where they help molecules like glucose or ions cross the membrane down their concentration gradient without needing energy. Did you know that carrier proteins are often highly specific? They have binding sites designed just for certain molecules, which means they can efficiently pick up and deliver their "cargo" across the cell membrane. Talk about VIP treatment for nutrients and ions!
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