1. Glycolysis: This is a central pathway in cellular respiration, occurring in the cytoplasm of cells. It breaks down glucose (a sugar) into pyruvate, generating a small amount of ATP (energy) and NADH (an electron carrier).
* Enzyme: Several enzymes are involved, including hexokinase, phosphofructokinase, and pyruvate kinase.
2. DNA Replication: This process duplicates the entire DNA molecule before cell division, ensuring that each daughter cell receives a complete set of genetic instructions.
* Enzyme: DNA polymerase is the primary enzyme, while other enzymes like helicase, primase, and ligase assist in the process.
3. Protein Synthesis: This process translates the genetic code from DNA into a functional protein. It occurs in ribosomes and involves two main stages: transcription and translation.
* Enzymes: RNA polymerase is essential for transcription (copying DNA into RNA), while many enzymes like aminoacyl tRNA synthetases and peptidyl transferase are involved in translation (converting RNA into protein).
These are just a few examples – there are countless other enzyme-catalyzed reactions that occur in living organisms. Enzymes are essential for all aspects of life, allowing for the efficient and specific control of biochemical processes.
