Question: are nucleotides and bases the same thing?
Answer: Nucleotide is the single unit of a polynucleotide chain. It is composed of a pentose sugar ( ribose in RNA and deoxyribose in DNA ), a nitrogenous base (purine or pyrimidine) and a phosphate group. Whereas a base pair is a pair of a purine and a pyrimidine joined by hydrogen bonds , between two nucleotides.