Ribosomes
70S ribosomes are characteristically found in which cellular compartment of eukaryotes?
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About This Question
- Subject
- biology
- Chapter
- cell structure and function
- Topic
- ribosomes
- Difficulty
- Medium
- Year
- 2025
Solution
Correct Answer:
Mitochondria and chloroplast
- Ribosome Types: Prokaryotes have 70S ribosomes, while the eukaryotic cytoplasm contains 80S ribosomes.
- Organelle Ribosomes: Curiously, semi-autonomous organelles like Mitochondria and Chloroplasts have their own DNA and their own 70S ribosomes.
- Endosymbiotic Theory: This provides evidence that these organelles originated from ancestral prokaryotic cells that were engulfed by a host cell.
- Protein Synthesis: Having their own ribosomes allows these organelles to synthesize some of their own proteins independently of the nuclear genome.
This medium difficulty biology question is from the chapter cell structure and function, covering the topic of ribosomes. It appeared in the 2025 exam.
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