First slide

Biomicromolecules

Question

Which of the following compounds lack a phosphate group in their chemical structure?

Easy

A

Adenylic acid
B

Uridine
C

DNA
D

RNA

Solution

Uridine is a nucleoside containing sugar and a nitrogen base. Adenylic acid is a nucleotide containing sugar, nitrogen base and phosphate molecule.
Nucleic acids like DNA and RNA consist of nucleotides only.

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