Answer:
Approximately 3% of the human genome contains DNA sequences that encode for protein building instructions. These sequences are known as exons, which make up only a small portion of the overall sequence of DNA found within every cell in our body. The vast majority of the human genome consists of non-coding regions that do not contain information directly related to encoding proteins. While these non-coding regions were once thought to have little functional significance, recent research has suggested that many of them play important roles in regulating gene expression and other biological processes.