Multiple choice Which among the following is not a characteristic function of ER? It acts as a supportive framework for the cell. It helps in the synthesis of proteins. It gives rigidity and shape to the cell. It helps in the transportation of proteins and lipids. Reveal answer Fill a bubble to check yourself C Correct answer Explanation Cell wall gives rigidity and shape to the plant cell. Endoplasmic reticulum helps in the synthesis and transport of proteins and fats.