DP IB Biology: HL

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Syllabus Edition

First teaching 2014

Last exams 2024

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7.3.3 Translation in Prokaryotes

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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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Phil

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Phil has a BSc in Biochemistry from the University of Birmingham, followed by an MBA from Manchester Business School. He has 15 years of teaching and tutoring experience, teaching Biology in schools before becoming director of a growing tuition agency. He has also examined Biology for one of the leading UK exam boards. Phil has a particular passion for empowering students to overcome their fear of numbers in a scientific context.