International A Level Biology / Proteins and DNA

Transcription: DNA to mRNA revision notes

Edexcel International A Level Biology (YBI11), chapter 5: Proteins and DNA, specification point 2.13. Part of the full course.

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Transcription makes a single-stranded mRNA molecule from one gene in the nucleus. The mRNA carries the gene’s code to a ribosome, where it can be used in protein synthesis.

More lessons in Proteins and DNA

• Enzymes: biological catalysts
• Active sites, specificity and induced fit
• Core practical 4: measuring the initial rate of an enzyme reaction
• Temperature, pH, enzyme and substrate concentration
• Nucleotides, DNA and RNA
• Semi-conservative DNA replication
• Meselson and Stahl: proving semi-conservative replication
• The genetic code
• Translation: mRNA to polypeptide