When this happens during DNA replication, the result is an unpredictable change in the nucleotide sequence of an organism's DNA. This process, called mutation, is part of what determines changes ...

The sequence of amino acids in the chain determines how the chain will fold up to make the protein, so different proteins have different three-dimensional shapes. The three-dimensional shape of a ...

When a gene is to be expressed, the base sequence of DNA is copied or transcribed ... Peptide bonds form between the adjacent amino acids to finalise the structure.