Answer:
1: Nucleic acid; 2: DNA ; 3: RNA
Step-by-step explanation:
Nucleic acid is a sequence of sugars, phosphates, and nitrogenous organic bases. Examples of nucleic acid are DNA and RNA. DNA is a complex molecule containing the genetic code. Transcription of DNA forms mRNA which in turn serve as template for protein synthesis. RNA is a nucleic acid that participates in the synthesis of proteins.