Answer: Rough ER.
- A Smooth ER
- B Rough ER
- C Golgi ER
- D Nuclear ER
Correct answer: B. Rough ER
Explanation: Rough ER has ribosomes on its surface. It is involved in synthesis and processing of secretory proteins.
Animal cell structure with major organelles labeled. Image: LadyofHats (Mariana Ruiz), Public Domain, via Wikimedia Commons.
Concept context
Cell theory, prokaryotic vs eukaryotic cells, organelles and their functions. Foundation of all biology.