Answer: 70S.
- A 80S
- B 70S
- C 60S
- D 40S
Correct answer: B. 70S
Explanation: Prokaryotic ribosomes are 70S (50S + 30S subunits). Eukaryotic cytoplasmic ribosomes are 80S.
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.