 Central dogma of molecular biology

A constraint on transfer of biological sequence information: information can pass among DNA and RNA and from RNA into protein, but a general transfer from protein sequence back into nucleic acid sequence is excluded. Reverse transcription changes an early simplified picture without contradicting the stated restriction.

The central dogma of molecular biology is a framework that describes the flow of genetic information within a biological system. It outlines the process through which DNA is transcribed into messenger RNA (mRNA), which is then translated into proteins. The central dogma can be summarized in three main steps: 1. **Replication**: The process by which DNA is copied to produce two identical DNA molecules. This is crucial for cell division and the transmission of genetic information to daughter cells.