All of the following describe transport proteins except?
Question: All of the following describe transport proteins except?
Transport proteins are essential components of biological membranes that facilitate the movement of molecules across the membrane. They can be classified into two main types: channel proteins and carrier proteins. Channel proteins form pores or channels that allow specific molecules or ions to pass through the membrane by diffusion. Carrier proteins bind to specific molecules and transport them across the membrane by changing their shape. Both types of transport proteins are selective, meaning they only transport certain molecules or ions.
However, not all of the following statements describe transport proteins accurately. Can you spot the incorrect one?
- Transport proteins can be either passive or active, depending on whether they require energy to transport molecules across the membrane.
- Transport proteins can increase the permeability of the membrane for certain molecules or ions that would otherwise not be able to cross the membrane.
- Transport proteins can regulate the concentration of molecules or ions inside and outside the cell by creating concentration gradients or maintaining equilibrium.
- Transport proteins can catalyze chemical reactions that involve the molecules or ions they transport across the membrane.
The correct answer is D. Transport proteins do not have catalytic activity, meaning they do not speed up or facilitate chemical reactions. That is the function of enzymes, which are another type of protein. Transport proteins only move molecules or ions across the membrane, but they do not alter them in any way.
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