Sequence information may pass among DNA and RNA and from RNA to protein; the dogma excludes a general transfer from protein sequence back into nucleic-acid sequence. Reverse transcription does not contradict it.
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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.