Biology

The correct answer is: D.Glycolipids and glycoproteins

Glycolipids and glycoproteins are key molecules in the cell membrane that are responsible for cell-cell communication and recognition. These molecules have carbohydrate (sugar) chains attached to them, which extend from the cell surface. The carbohydrate chains serve as recognition sites that help the cell recognize and interact with other cells, important for processes like immune response, tissue formation, and cell signaling.

Why the other options are not correct:

A.Cholesterol: Cholesterol stabilizes the membrane's fluidity but is not involved in cell-cell communication.

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