Which of the Following is True About Glucose Transporters

Question

Which of the following is true about glucose transporters?
A)GLUT-2 and GLUT-4 are expressed on all cell types.
B)All the members of the GLUT family have the same affinity for glucose.
C)Cells that express GLUT-1 and GLUT-3 display more glucose uptake than cells expressing GLUT-2 at physiological blood concentrations (5 mM).
D)GLUT proteins are specific for glucose molecules and will not transport other sugars.

Accepted Answer

GLUT-1 and GLUT-3 have a high affinity for glucose, allowing cells expressing these transporters to uptake more glucose at physiological blood concentrations compared to cells expressing GLUT-2, which has a lower affinity for glucose.