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
a. Nitrogen base
c. Sugar phosphate
Option (d) Nucleotide is the answer.