Here's why:
* DNA structure: DNA is a complex molecule composed of nucleotides that contain genetic instructions. These instructions determine an organism's traits, such as eye color, height, and susceptibility to certain diseases.
* Inheritance: DNA is passed down from parents to offspring, ensuring the continuity of genetic information across generations.
* Protein synthesis: DNA serves as a blueprint for protein synthesis. The genetic code in DNA is transcribed into RNA, which then directs the assembly of proteins, the building blocks of life.
While other cellular components play roles in genetic processes, DNA is the primary repository of genetic information.
