Syllabus Edition

First teaching 2014

Last exams 2024

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Translation in Prokaryotes (DP IB Biology: HL)

Revision Note

Phil

Author

Phil

Expertise

Biology

Translation in Prokaryotes

  • Prokaryotic cells have a less complex ultrastructure than eukaryotic cells
    • Eukaryote cells are divided up into membrane-bound compartments called organelles
    • Transcription and translation happen in different compartments because ribosomes are separated from the nucleus
  • The lack of a nucleus is a defining cellular feature of prokaryotes, allowing transcription and translation to take place in the same compartment
  • Translation can occur immediately after transcription due to the absence of a nuclear membrane
    • Both processes proceed simultaneously and likely in a coupled fashion
    • Translation starts even before the mRNA has finished being transcribed from the DNA

translation-prokaryotes-versus-eukaryotes-ib-

Transcription and translation occur simultaneously in prokaryotes due to the absence of a nuclear membrane. Ribosomes start translating the mRNA whilst it is still being synthesised.

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