Nucleic acids are the organic materials present in all organisms in the form of DNA or RNA. These nucleic acids are formed by the combination of nitrogenous bases, sugar molecules and the phosphate groups that are linked by different bonds in a series of sequences. The DNA structure defines the basic genetic makeup of our body.
It would read as GATACA. This is not the correct sequence and code, so an incorrect protein is made. It is a change in DNA when a is copied. This could happen under ultra-violet rays and other environmental factors.