Question

question 39 which structure is the site of synthesis of proteins destined for export from the cell? smooth er lysosomes rough er golgi vesicles free cytoplasmic ribosomes

Explanation:

Rough endoplasmic reticulum (ER) has ribosomes attached to its surface. These ribosomes synthesize proteins that are destined for export from the cell. Smooth ER is involved in lipid - synthesis and detoxification, lysosomes are for digestion, Golgi vesicles are for modifying and transporting proteins, and free cytoplasmic ribosomes synthesize proteins that function within the cytoplasm.

Answer:

C. rough ER