Consider the following three biomolecules: X: Uridine Y: Cytidylic acid Z: Guanine Choose the option that correctly categorizes X, Y, and Z.

Step-by-step solution

X is Uridine, which is formed by the attachment of a nitrogenous base (uracil) to a pentose sugar (ribose). Thus, it is a nucleoside. Y is Cytidylic acid, which consists of a nitrogenous base (cytosine), a pentose sugar (ribose), and a phosphate group. Thus, it is a nucleotide. Z is Guanine, which is a nitrogenous base with a double-ring structure. Thus, it is a purine base. Answer: X - Nucleoside; Y - Nucleotide; Z - Purine base