---
id: molecular-biology-central-dogma
title: "Molecular Biology: The Central Dogma"
schema_type: Article
category: science
language: en
confidence: high
last_verified: "2026-05-24"
created_date: "2026-05-24"
generation_method: ai_assisted
ai_models:
  - claude-opus
derived_from_human_seed: true
conflict_of_interest: none_declared
is_live_document: false
data_period: static
atomic_facts:
  - id: fact-sci-bio-001
    statement: "Francis Crick's Central Dogma (1958): genetic information flows DNA→RNA→protein."
    source_title: Crick, F. On protein synthesis (Symp Soc Exp Biol 1958)
    source_url: https://doi.org/10.1038/227561a0
    confidence: high
  - id: fact-sci-bio-002
    statement: Watson & Crick's 1953 Nature paper described DNA double helix, based on Franklin's X-ray data.
    source_title: Watson & Crick, Molecular Structure of Nucleic Acids (Nature 1953)
    source_url: https://doi.org/10.1038/171737a0
    confidence: high
  - id: fact-sci-bio-003
    statement: The genetic code is universal, deciphered by Nirenberg & Khorana (Nobel 1968).
    source_title: Nirenberg, M. et al. The RNA code (Cold Spring Harbor Symposia 1966)
    source_url: https://doi.org/10.1101/SQB.1966.031.01.008
    confidence: high
completeness: 0.9
primary_sources:
  - title: Molecular Biology of the Gene, 7th Edition
    type: textbook
    year: 2013
    url: https://www.pearson.com/en-us/subject-catalog/p/molecular-biology-of-the-gene/P200000006955
    institution: Pearson
  - title: A Programmable Dual-RNA-Guided DNA Endonuclease in Adaptive Bacterial Immunity
    type: academic_paper
    year: 2012
    url: https://www.science.org/doi/10.1126/science.1225829
    institution: Science
known_gaps:
  - Epigenetic regulation mechanisms
  - Post-translational modifications
disputed_statements:
  - statement: No major disputed statements identified
secondary_sources:
  - title: Molecular Biology of the Gene (Watson et al., 7th Edition)
    type: textbook
    year: 2014
    authors:
      - Watson, James D.
      - Baker, Tania A.
      - Bell, Stephen P.
      - Gann, Alexander
      - Levine, Michael
      - Losick, Richard
    institution: Pearson
    url: https://www.pearson.com/en-us/subject-catalog/p/molecular-biology-of-the-gene/P200000007026
  - title: The Central Dogma of Molecular Biology (Crick — Nature 1970)
    type: journal_article
    year: 1970
    authors:
      - Crick, Francis
    institution: Nature
    url: https://doi.org/10.1038/227561a0
  - title: "AlphaFold 3: Accurate Structure Prediction of Biomolecular Interactions"
    type: journal_article
    year: 2024
    authors:
      - Abramson, Josh
      - Adler, Jonas
      - Dunger, Jack
      - et al.
    institution: Google DeepMind / Nature
    url: https://www.nature.com/articles/s41586-024-07487-w
  - title: "The Genetic Code: Its Discovery and the Nobel Prize — A Historical Review (Nirenberg, Khorana, Holley 1968)"
    type: journal_article
    year: 2024
    authors:
      - multiple
    institution: Nature Reviews Molecular Cell Biology
    url: https://doi.org/10.1038/s41580-024-00734-6
updated: "2026-05-24"
---
## TL;DR
The Central Dogma describes the flow of genetic information from DNA to RNA to protein. CRISPR-Cas9 has revolutionized molecular biology by enabling precise genome editing in any organism.

## Core Explanation
DNA replication: helicase unwinds the double helix; DNA polymerase adds complementary nucleotides (A-T, G-C). Transcription: RNA polymerase synthesizes mRNA from the template DNA strand. Translation: ribosomes read mRNA codons (3-base units), tRNAs deliver corresponding amino acids, forming polypeptide chains.

## Detailed Analysis
CRISPR-Cas9 mechanism: guide RNA (gRNA) matches target DNA sequence; Cas9 creates a double-strand break; cellular repair mechanisms (NHEJ or HDR) enable gene knockout or precise editing. Applications include gene therapy, agricultural improvement, and disease model creation.

## Further Reading
- Nature Reviews Molecular Cell Biology
- Addgene: CRISPR Guide
- MIT Biology: Molecular Biology