Question

which molecule is the building block of a carbohydrate? nitrogenous base monosaccharide nucleotide phosphate group amino acid fatty acid

Explanation:

Carbohydrates are composed of simple sugars. Monosaccharides are the simplest form of sugars and are the building - blocks of more complex carbohydrates like disaccharides and polysaccharides. Nitrogenous bases are part of nucleic acids, nucleotides are the building blocks of nucleic acids, phosphate groups are also components of nucleic acids and some other biomolecules, amino acids are the building blocks of proteins, and fatty acids are components of lipids.

Answer:

monosaccharide