Carbohydrate residues attached to the membrane lipids are:
A) always positioned on the intracellular side of the membrane.
B) always positioned on the inside center of the bilayer.
C) always positioned on the extracellular side of the membrane.
D) always positioned equally on both sides of the membrane.
E) also covalently attached to membrane proteins.

Question

Quizplus · Accepted Answer

Carbohydrate residues attached to the membrane lipids are always positioned on the extracellular side of the membrane. This is because they are involved in cell-cell recognition and interactions with molecules outside of the cell. They are not found on the intracellular side of the membrane or in the center of the bilayer. Carbohydrate residues can also be covalently attached to membrane proteins, but this is not always the case for membrane lipids.

Carbohydrate Residues Attached to the Membrane Lipids Are