Biology Dictionary

  • Transcribed spacer

    Transcribed spacer

    A non-coding region of RNA that is transcribed but not translated, often found between regions encoding rRNA or tRNA.

  • Transcript

    Transcript

    The RNA copy of a gene’s DNA sequence, synthesized during transcription as the first step in protein production.

  • Transcription

    Transcription

    The process of converting a segment of DNA into RNA, leading to the formation of mRNA, rRNA, or tRNA.

  • Transcription factor

    Transcription factor

    Proteins that bind to specific DNA sequences to regulate the transcription of genes, influencing gene expression.

  • Transdetermination

    Transdetermination

    The change in cell fate or differentiation during development, typically resulting from environmental signals or mutations.

  • Transduction

    Transduction

    The process of transferring genetic material from one bacterium to another via a virus (bacteriophage).

  • Transect, line

    Transect, line

    A straight line or path used in ecological studies to observe and sample organisms or environmental conditions along its length.

  • Tortoise

    Tortoise

    A slow-moving terrestrial reptile with a hard shell, known for its long lifespan and living primarily on land.

  • Toxicology

    Toxicology

    The branch of science that studies the harmful effects of substances on living organisms and the environment.

  • Toxin

    Toxin

    A harmful biological substance produced by organisms, such as bacteria, fungi, or plants, that causes damage to tissues or organs.