Discussion
Ribozymes are
Answer: A
Correct answer: RNA acting as enzymes
A ribozyme is a molecule of RNA that acts as a catalyst. Its discovery by Cech and Altman overturned the assumption that all enzymes are proteins, and it matters for another reason: the peptidyl transferase activity of the ribosome is itself a ribozyme, so protein synthesis is catalysed by RNA. That is one of the strongest arguments for an early RNA world.
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