Final answer:
The major product of purine nucleotide catabolism is uric acid, and nucleotides are the building blocks of DNA and RNA, made up of a sugar, a phosphate group, and a nitrogenous base.
Step-by-step explanation:
The major product of the catabolism of purine nucleotides is uric acid, particularly in primates including humans. During this catabolic process, purine nucleotides are broken down, ultimately leading to the production of uric acid, which is then excreted from the body. In other organisms like birds and reptiles, uric acid can be further converted into other compounds.
Nucleotides are the building blocks of nucleic acids like DNA and RNA. Each nucleotide is composed of three components: a sugar molecule, a phosphate group, and a nitrogenous base. The sugar in DNA nucleotides is deoxyribose, and in RNA nucleotides, it is ribose. There are different nitrogenous bases for purines (adenine and guanine) and pyrimidines (cytosine, thymine, and uracil).