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Questions and Answers
What is the primary composition of the ribosome, one of the most critical components of cells?
What is the primary composition of the ribosome, one of the most critical components of cells?
- RNA (correct)
- DNA
- Proteins
- Lipids
Who proposed the concept of the RNA world?
Who proposed the concept of the RNA world?
- Alexander Rich (correct)
- Walter Gilbert
- Both Alexander Rich and Walter Gilbert
- No one proposed the concept of the RNA world
What is the RNA world?
What is the RNA world?
- A stage in the evolutionary history of life on Earth where all four RNA building blocks were formed concurrently
- A stage in the evolutionary history of life on Earth where self-replicating RNA molecules proliferated before the evolution of DNA and proteins (correct)
- A stage in the evolutionary history of life on Earth where RNA enzymes (ribozymes) catalyzed chemical reactions critical for life
- A stage in the evolutionary history of life on Earth where DNA and proteins proliferated before the evolution of RNA molecules
What may be surviving remnants of covalently bound coenzymes in an RNA world?
What may be surviving remnants of covalently bound coenzymes in an RNA world?
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What ability did some ancient RNAs evolve to protect other RNAs?
What ability did some ancient RNAs evolve to protect other RNAs?
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