Enzymes<span> are protein catalysts that speed biochemical </span>reactions<span> by facilitating the molecular rearrangements that support cell function.
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Answer: Silent mutations occur when the change of a single DNA nucleotide within a protein-coding portion of a gene does not affect the sequence of amino acids that make up the gene's protein. ... And when the amino acids of a protein stay the same, researchers believed, so do its structure and function.