First slide

Biomicromolecules

Question

Uridine, present only in RNA is a

Easy

A

Nucleoside
B

Nucleotide
C

Purine
D

Pyrimidine

Solution

When nitrogen bases (adenine, guanine, cytosine, uracil, and thymine) are attached to a sugar, they are called nucleosides. If a phosphate group is also found esterified to the sugar they are called nucleotides. Adenosine, guanosine, thymidine, uridine and cytidine are nucleosides. Adenylic acid, thymidylic acid, guanylic acid, uridylic acid and cytidylic acid are nucleotides.

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