What is the difference between ribonucleotides that compose RNA and deoxyribonucleotides that compose DNA? A) Ribonucleotides lack a hydroxyl group on the 2' carbon. B) Ribonucleotides have an extra phosphate group. C) Deoxyribonucleotides lack a hydroxyl group on the 2' carbon. D) Deoxyribonucleotides contain an additional nitrogenous base.