BRAINCAKEGenomics and Proteomics
There are 10 - 40 times as may proteins as there are genes. The sequence of amino-acids cannot always be predicted from the sequence of DNA as many genes code for more than one polypeptide. One mechanism is the alternative splicing by spliceosomes. Introns can be removed from pre-mRNA molecules in a variety of ways to give different proteins or variants of the same protein.
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Key terms in this lesson
- intron
- A non-coding section of a gene or pre-mRNA molecule that is removed by splicing before translation.
More in Genetic Engineering and Biotechnology
- The Polymerase Chain Reaction
- DNA Sequencing
- Automated Sequencing
- Pathogens, DNA Barcoding
- Recombinant DNA
- Genetic Engineering
- Genetically Engineering Different Organisms
- Genetically Engineering Plants
All 17 lessons in Genetic Engineering and Biotechnology · All AQA A-level Biology topics