What type of macromolecule is DNA classified as?

• A. Lipid
• B. Protein
• C. Carbohydrate
• D. Nucleic Acid

Answer: (D)

Verified step by step guidance

1. Understand the four main types of macromolecules: carbohydrates, lipids, proteins, and nucleic acids. Each has distinct functions and structures.
2. Recognize that DNA (Deoxyribonucleic Acid) is a molecule that carries genetic information crucial for the development, functioning, and reproduction of all living organisms.
3. Identify the structure of DNA, which consists of two long chains of nucleotides twisted into a double helix. Each nucleotide is composed of a sugar, a phosphate group, and a nitrogenous base.
4. Recall that nucleic acids, such as DNA and RNA, are polymers made up of monomers called nucleotides. This distinguishes them from other macromolecules like proteins (made of amino acids), carbohydrates (made of sugar units), and lipids (composed of fatty acids and glycerol).
5. Conclude that DNA is classified as a nucleic acid because it is a polymer of nucleotides, which is the defining characteristic of this type of macromolecule.