Question

multiple choice question which endoplasmic reticulum is involved in lipid synthesis? rough er smooth er free er

Explanation:

The smooth endoplasmic reticulum (Smooth ER) is responsible for lipid synthesis. Rough ER is mainly involved in protein synthesis (due to ribosomes on its surface), and "Free ER" is not a standard term for a type of ER involved in lipid synthesis.

Answer:

B. Smooth ER (assuming the options are labeled as A. Rough ER, B. Smooth ER, C. Free ER for clarity; based on the given options, the correct one is Smooth ER)