RNA makes proteins by translation 1. Notes on Nucleic Acids A. Nucleotides 1. Nucleic Acids are made of many nucleotides connected together. Nucleotides are made of a phosphate group connected to a sugar, which is connected to a nitrogenous base. Purines have two ring structures.
Pyrimidines have single ring structures.
A Special Nucleotide 1. ATP is the immediate energy source for all living things 2. ATP is composed of 3 phosphate groups connected to ribose, which is connected to adenine 3. ATP is produced in the cytoplasm or mitochondria during respiration 4. ATP Mechanisms C. Structure of Nucleic Acids 1.