1. DNA performs biological and physiological functions in organisms. It regulates the characteristic features of organisms through biological and physiological functions.
2. DNA acts as a transmitter of biological signals in organisms. It provides the genetic code of the organism. Hereditary signals act as indicators of the characteristic traits of organisms.
3. DNA makes accurate copies. Therefore, the replication process creates identical DNA. New DNA molecules carry genetic information.
4. DNA serves as the molecular or physical basis of heredity in organisms. It is the holder and carrier of the heredity of living beings. Bears and controls all the characteristics of living beings. So only DNA controls the characteristics of organisms.
5. DNA gives expression to all the characteristics of an organism. It causes variation, mutation and evolution of organisms. As a result, the properties change.
6. Human DNA is damaged 1000 to 1000000 times every day. Fortunately, these damages can be repaired. Cancer occurs when the repair process is disrupted.