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Biology SL

SLHL

Chapter 3: DNA and Protein Synthesis

Follow genetic information from faithful DNA copying through transcription, RNA processing and translation, then investigate mutation, gene editing and epigenetic control.

Estimated chapter time: 238 minutes

IB syllabus: D1.1 · D1.2 · D1.3 · D2.2 · SL and HL

Chapter Topics

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  1. 1How this chapter works
    1. 1.1Information beyond bases
    2. 1.2Direction in diagrams
    3. 1.3Copying, expression and regulation
  2. 2Semi-conservative replication
    1. 2.1Parental templates
    2. 2.2Meselson–Stahl evidence
    3. 2.3Accuracy and variation
  3. 3Amplification, profiling and sequencing
    1. 3.1PCR target selection
    2. 3.2Gel electrophoresis
    3. 3.3Sequencing and diagnosis
  4. 4Transcription and gene activation
    1. 4.1RNA polymerase
  5. 5Translation and genetic code
    1. 5.1Codons and code
    2. 5.2tRNA and anticodons
    3. 5.3Ribosome chain growth
  6. 6Mutation consequences
    1. 6.1New alleles
    2. 6.2Substitutions and frameshifts
    3. 6.3Mutation case studies
  7. 7Chapter synthesis
    1. 7.1Information checkpoints
    2. 7.2Sequence discipline
    3. 7.3Evidence and alternatives

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