[问答题]
DNA and RNA are nucleic acids /c-s r3 ihujg+s- k)b(:caa qo.(nfsathat are essential to a5*g3i l zi4bkyll living organisms.
1.Distinguish between ATP and DNA.
2.Discuss model-making as an approach used in the discovery of the structure of DNA and the importance of this discovery.
3.DNA is a polymer of nucleotides. Describe the structure of DNA.