Concept:The smooth endoplasmic reticulum (SER) is primarily responsible for the synthesis of lipids and steroid hormones, and it lacks ribosomes on its surface.Explanation:The SER does not have ribosomes attached, which gives it a smooth appearance.It is not involved in protein synthesis; that function belongs to the rough endoplasmic reticulum.Carbohydrate synthesis takes place in chloroplasts, not in the SER.Therefore, among the options, the correct statement is that the SER is the major site for the synthesis of lipids.Answer:Option C
