The sequence of amino acids in each protein is specified by the sequence of codons in the corresponding mRNA, which in turn matches the sequence of bases in the DNA. The very specific relationship between a given mRNA codon and its matching tRNA molecule, which is only ever attached to a single type of amino acid, is essential to the conversion of the DNA’s code into proteins.
The sequence of amino acids in a protein determines its function. As we saw before, protein functions are essential for life. This is why DNA is so important – it contains all the instructions needed to make our cells and bodies work.
I fight infections!
I make mRNAs!
8
I control it all!
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