Which molecule would most likely require a transport protein to cross the plasma membrane of a red blood cell?
Question: Which molecule would most likely require a transport protein to cross the plasma membrane of a red blood cell?
A molecule that would most likely require a transport protein to cross the plasma membrane of a red blood cell is glucose. Glucose is a sugar that is essential for energy metabolism in cells, and red blood cells rely on it as a primary source of energy. However, glucose cannot easily diffuse across the plasma membrane of a red blood cell because the membrane is made up of lipids, which are hydrophobic (water-repelling) and glucose is hydrophilic (water-loving). To cross the plasma membrane, glucose would require a transport protein, such as GLUT1, which acts as a channel that allows glucose to move across the membrane. Transport proteins are specific for certain molecules and can either facilitate diffusion or actively transport molecules across the membrane by using energy.
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