Definition
Ribozymes are RNA molecules that possess catalytic activity, similar to protein enzymes. They are fundamental to the “RNA World” hypothesis for the origin of life.
Why It Matters
Ribozymes prove that ‘Information’ and ‘Action’ could once exist in the same molecule (RNA). This ‘RNA World’ is the missing link in how life began, showing that biological complexity can emerge from a single, versatile substrate.
Core Concepts
- Catalytic RNA: Unlike most enzymes which are proteins, ribozymes use RNA structure to catalyze chemical reactions.
- The RNA World: The theory that early life used RNA for both information storage (like DNA) and chemical catalysis (like proteins).
- Ribosome: The ribosome itself is essentially a massive ribozyme.