Question

which type of er are responsible for forming membrane proteins? smooth er rough er golgi bodies

Explanation:

Rough ER (endoplasmic reticulum) has ribosomes attached to its surface. Ribosomes are responsible for protein synthesis, including membrane proteins. Smooth ER is involved in lipid synthesis and detoxification, and Golgi bodies modify and package proteins, not synthesize membrane proteins. So rough ER is responsible for forming membrane proteins.

Answer:

B. rough ER