1. DNA acts as the building block of chromosomes.
2. DNA acts as the molecular or physical basis of heredity.
3. It carries and controls all the characteristics of the organism.
4. It transfers the characteristics of organisms from generation to generation.
5. It manifests all the characteristics of the organism.
6. DNA causes variation, mutation and evolution of organisms.
7. DNA controls the biological and physiological functions of organisms.
8. It plays a role in protein synthesis.
9. DNA has a role in identifying each species.
10. DNA controls the metabolic functions of organisms.
11. It maintains the species of organisms through replication.
