Answer: Base pairs are formed when adenine forms a hydrogen bond with thymine, or cytosine forms a hydrogen bond with guanine. The second part of a nucleotide is the phosphate, which differentiates the nucleotide molecule from a nucleoside molecule.
Explanation:
Answer: A because two of the same pairs are homologous
photosystem 2, photosystem 1, pumping hydrogen..., and making NADPH
