Molecular Biology

Molecular mechanisms of information flow in cells — replication, transcription, translation, and their regulation.


foundation tier

Molecular Biology sits within biology and addresses molecular mechanisms of information flow in cells — replication, transcription, translation, and their regulation. The page below sketches the conceptual scope of the area, the methodological tools it relies on, and the recent literature anchoring its current frontier.

The area organises around a small number of recurring axes: scope (what biological scales the work spans), method (the dominant experimental or computational tools), data regime (what kinds of measurements are now routine vs. still frontier), and open questions (what the field cannot yet do reliably). The sources below cover different combinations of these axes.

Foundational references

Watson, Molecular Biology of the Gene is a standard reference for the foundations covered here, used across the field to anchor terminology, canonical models, and the relationships between sub-areas of molecular biology. Treat it as the entry point to which the more specialised work below adds frontier detail.

Krebs, Lewin’s Genes XII is a standard reference for the foundations covered here, used across the field to anchor terminology, canonical models, and the relationships between sub-areas of molecular biology. Treat it as the entry point to which the more specialised work below adds frontier detail.

Open questions

Open questions in molecular biology cluster around scaling current methods to larger systems, integrating measurements across modalities, and producing predictive rather than descriptive models. The references above mark the work that the next iteration of this page should engage with in more specific detail.

Prerequisites

Sources

  • textbook · primary · 2014
    Molecular Biology of the Gene
    watson-james-2014, baker-tania-2014, bell-stephen-2014, gann-2014, levine-michael-2014, losick-2014
  • textbook · primary · 2017
    Lewin's Genes XII
    krebs-2017, goldstein-2017, kilpatrick-2017

In context

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Explore

  1. 01

    Central Dogma

    DNA → RNA → protein as the canonical information-flow scheme and its known exceptions.

  2. 02

    CRISPR Genome Editing

    Programmable nucleases and base/prime editors derived from microbial adaptive immunity that introduce targeted changes to genomic DNA, and the mechanistic and delivery work that determines what they can safely edit.

  3. 03

    DNA Replication

    Semiconservative copying of DNA — replisome architecture, fidelity, and replication-fork dynamics.

  4. 04

    DNA Damage and Repair

    Lesion recognition and repair pathways — base excision, nucleotide excision, mismatch, homologous recombination, NHEJ.

  5. 05

    Transcription

    RNA polymerase machinery, promoter recognition, elongation, and termination in prokaryotes and eukaryotes.

  6. 06

    RNA Processing and Splicing

    Capping, splicing, polyadenylation, alternative splicing, and the spliceosome.

  7. 07

    Translation

    Ribosome-mediated protein synthesis — initiation, elongation, termination, and fidelity.

  8. 08

    Gene Regulation

    Transcription factors, enhancers, repressors, and regulatory logic in prokaryotic and eukaryotic genomes.

  9. 09

    Non-Coding RNAs

    miRNAs, siRNAs, lncRNAs, snoRNAs, piRNAs and their regulatory roles.

  10. 10

    Epigenetics

    Heritable changes in gene expression without DNA-sequence change — chromatin states, methylation, and histone code.

  11. 11

    Molecular Cloning

    Recombinant DNA techniques — restriction, ligation, Gibson assembly, Golden Gate.

  12. 12

    PCR and Nucleic Acid Amplification

    Polymerase chain reaction, qPCR, isothermal amplification, and diagnostic applications.

  13. 13

    Sequencing Technologies

    Short-read, long-read, and single-molecule sequencing platforms underlying modern genomics.

  14. 14

    Transposons and Mobile Genetic Elements

    Transposable elements, retrotransposons, and their roles in genome evolution and regulation.

  15. 15

    Telomeres and Centromeres

    Structure, replication, and function of chromosome ends and kinetochore-binding regions.

  16. 16

    Ribosome Biology

    Ribosome biogenesis, ribosome heterogeneity, and ribosome profiling.


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