Here's why:
* Genetic Code: DNA contains the genetic instructions for building and maintaining an organism. It's like a blueprint that dictates everything from eye color to susceptibility to certain diseases.
* Inheritance: DNA is passed down from parents to offspring, ensuring the continuity of traits across generations.
* Protein Synthesis: DNA provides the code for creating proteins, which are essential for virtually every biological process. Proteins build structures, regulate functions, and catalyze reactions.
While other molecules are important, DNA stands out as the primary determinant of an organism's characteristics.