Connected knowledge

Central dogma

Idea that information flows from DNA to RNA and from RNA to proteins.

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Concept

Central dogma

Idea that information flows from DNA to RNA and from RNA to proteins.

It is the principle that describes the predominant transfer of sequential information from DNA to RNA and from RNA to proteins. It distinguishes the storage, expression, and translation of genetic information.

The central dogma organizes fundamental concepts in molecular genetics and relates genes to functional products. It does not exclude mechanisms such as reverse transcription, but establishes restrictions on transfers of information from proteins to nucleic acids.

The video explains that Crick postulated that information originates in DNA, travels through RNA, and culminates in proteins, always in a single, irreversible direction once converted into protein, a scheme he called the central dogma in 1958, not as an absolute truth but as a general rule about how life works. It presents replication, transcription, and translation as the three processes that sustain it, and notes that in 1970 the discovery of reverse transcription showed that information can also flow from RNA to DNA, though Crick clarified that the dogma never forbade that, only that information leave a protein toward a nucleic acid.

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