Which of the following correctly describes the components of DNA?

• A. DNA is composed of amino acids linked by peptide bonds.
• B. DNA is composed of nucleotides, each containing a sugar, a phosphate group, and a nitrogenous base.
• C. DNA is composed of carbohydrates and lipids forming a single-stranded structure.
• D. DNA is composed of lipids and proteins forming a double helix structure.

Answer: (B)

Verified step by step guidance

1. Understand that DNA is a type of nucleic acid, which is a macromolecule essential for all known forms of life.
2. Recognize that the basic building blocks of DNA are nucleotides.
3. Each nucleotide in DNA is composed of three components: a sugar molecule (deoxyribose), a phosphate group, and a nitrogenous base.
4. The nitrogenous bases in DNA are adenine (A), thymine (T), cytosine (C), and guanine (G).
5. DNA forms a double helix structure, where two strands of nucleotides are linked by hydrogen bonds between complementary bases (A with T and C with G).