Why can damage to a nucleic acid lead to a person not producing enzyme?

Damage to nucleic acids, such as DNA, can lead to mutations that disrupt the coding sequence of genes responsible for enzyme production. If the genetic information is altered, the resulting mRNA may be nonfunctional or absent, preventing the synthesis of the corresponding enzyme. Additionally, if the damage affects regulatory regions, it can impair the transcription of the gene entirely. Consequently, without the proper enzyme, various biochemical processes may be disrupted, impacting cellular function and overall health.