A nucleotide consists of a phosphate group, a pentose sugar, and a __________________, all linked together by covalent bonds. potassium-containing base polypeptide phosphorus-containing base nitrogen-containing base triglyceride
The correct answer would be the fourth option. A nucleotide consists of a phosphate group, a pentose sugar, and a nitrogen containing base that are all linked together by covalent bonds. Nucleotides are the monomer units of nucleic acids and is the basic unit of the DNA.
