DNA is constructed of which of the following components?

• A. Nucleotides composed of a phosphate group, deoxyribose sugar, and a nitrogenous base
• B. Monosaccharides joined by glycosidic bonds
• C. Amino acids linked by peptide bonds
• D. Fatty acids and glycerol molecules

Answer: (A)

Verified step by step guidance

1. Understand that DNA is a polymer made up of repeating units called nucleotides.
2. Recall that each nucleotide consists of three components: a phosphate group, a sugar (specifically deoxyribose in DNA), and a nitrogenous base.
3. Recognize that monosaccharides joined by glycosidic bonds refer to carbohydrates, not DNA.
4. Know that amino acids linked by peptide bonds form proteins, which are different from DNA.
5. Identify that fatty acids and glycerol molecules make up lipids, which are also distinct from DNA.