58. Jahrgang, 1971 Heft 10 Oktober | MANFRED EIGEN
The introduction of the chapter "Selforganization of Matter and the Evolution of Biological Macromolecules" by Manfred Eigen provides a foundational overview of the topic. It begins with the question of the origin of life, often framed as a problem of cause and effect. The author highlights the complexity of life, particularly in the context of molecular biology, where the interplay between nucleic acids and proteins is crucial. The chapter then delves into the specific functional links between these molecules, including:
1. **DNA and DNA Polymerase**: DNA serves as the stable source of information, copied by the enzyme DNA polymerase.
2. **mRNA and RNA Polymerase**: mRNA transcribes the genetic instructions for protein synthesis from DNA, facilitated by RNA polymerase.
3. **tRNA and Amino Acyl Synthetases**: tRNA molecules recognize specific amino acids, which are linked to them by aminoacyl synthetases.
4. **Ribosomal RNA and Proteins**: Protein synthesis occurs at the ribosome, a complex of RNA and proteins that catalyzes peptide bond formation.
5. **Operon, Operator, Promotor, and Repressor**: Transcription is regulated by protein subunits that interact with specific sites on the DNA, such as the lac operon.
The chapter emphasizes the importance of these functional links in understanding the self-reproducing cycle of the cell and the evolution of biological macromolecules.The introduction of the chapter "Selforganization of Matter and the Evolution of Biological Macromolecules" by Manfred Eigen provides a foundational overview of the topic. It begins with the question of the origin of life, often framed as a problem of cause and effect. The author highlights the complexity of life, particularly in the context of molecular biology, where the interplay between nucleic acids and proteins is crucial. The chapter then delves into the specific functional links between these molecules, including:
1. **DNA and DNA Polymerase**: DNA serves as the stable source of information, copied by the enzyme DNA polymerase.
2. **mRNA and RNA Polymerase**: mRNA transcribes the genetic instructions for protein synthesis from DNA, facilitated by RNA polymerase.
3. **tRNA and Amino Acyl Synthetases**: tRNA molecules recognize specific amino acids, which are linked to them by aminoacyl synthetases.
4. **Ribosomal RNA and Proteins**: Protein synthesis occurs at the ribosome, a complex of RNA and proteins that catalyzes peptide bond formation.
5. **Operon, Operator, Promotor, and Repressor**: Transcription is regulated by protein subunits that interact with specific sites on the DNA, such as the lac operon.
The chapter emphasizes the importance of these functional links in understanding the self-reproducing cycle of the cell and the evolution of biological macromolecules.