When you take cells or tissue pieces and grind them with an acid in a mortar and pestle, all the small biomolecules dissolve in the acid. Proteins, polysaccharides and nucleic acids are insoluble in mineral acid and get precipitated. The acid soluble compounds include amino acids, nucleosides, small sugars etc. When one adds a phosphate group to a nucleoside one gets another acid soluble biomolecule called

Options

A. Nitrogen base
B. Adenine
C. Sugar phosphate
D. Nucleotide

Answer

D

Explanation

Nucleoside is basically pentose sugar + nitrogenous base. Nucleotide is pentose sugar + nitrogenous base + phosphate group. DNA and RNA are composed of
nucleotides.