DNA, proteins, and fats are all essential biomolecules that play crucial roles in the biology of living organisms. One key similarity they share is that they are all composed of smaller units that are necessary for various biological functions.
DNA is made up of nucleotides, which are the building blocks that store and transfer genetic information. Proteins are made of amino acids, which are linked together in specific sequences to perform a wide range of functions, from catalyzing reactions as enzymes to providing structural support. Fats, or lipids, are composed of fatty acids and glycerol, and they serve as energy storage and components of cellular membranes.
Moreover, all three are involved in the storage and transfer of energy within cells. DNA carries the genetic instructions needed for the synthesis of proteins that carry out cellular functions. Proteins can also play roles in how fats are metabolized and used for energy. Therefore, while they are different in structure and function, DNA, proteins, and fats are interconnected in the complex web of life.