Explain how a change in the sequence of nitrogen bases in a dna molecule could result in a gene mutation

Well, the order and set processes of the nitrogen bases has dominance over the order of the amino acids in the protein. If the bases are altered or mutated, then the amino acids that theseems nitrogen bases code for, are changed. This leads to a different set of amino acids, and therefore a different protein. A different protein is composed, and then the gene containing this different protein will also be different. This has a greater overall impact on some genes than others, depending on which part of the DNA polymer/polymerase is mutated