Components:
Pentose Sugar: $$\beta$$-D-2-deoxyribose (DNA) or $$\beta$$-D-ribose (RNA).
Phosphoric Acid: Linked to $$\text{C-5}'$$ hydroxyl group.
Nitrogenous Bases:
- Purines: Adenine (A), Guanine (G).
- Pyrimidines: Cytosine (C), Thymine (T - in DNA), Uracil (U - in RNA).