Answer: 1) DNA ( deoxyribonucleic acid) is considered as the genetic material of living organisms ( that is passed from parents to next generation). It determines the structure of protein that carry out essential function of life.
2) The importance of DNA determining proteins is that the proteins, which are formed, corresponds to specific cellular activities ( such as digestion of proteins, fats, carbohydrates) as well as the characteristics/ traits ( like color of skin, color of eyes) of the organism.
In this way, traits are passed from parents to their offspring through genetic material.