Biochemistry Molecular Genetics cb866ad3 A nucleoside consists of: A Nitrogenous base B Purine or pyrimidine base + sugar C Purine or pyrimidine base + phosphorous D Purine + pyrimidine base + sugar + phosphorous High-Yield Explanation Ans. B. Purine or pyrimidine base + sugarposition of nucleotides = Sugar + Base + Phosphate Composition of nucleosides = Sugar + Base. No phosphate is present.