Final answer:
A nucleotide of DNA contains deoxyribose sugar, a phosphate group, and one of the nitrogen-containing bases: adenine, cytosine, guanine, or thymine. Uracil is not found in DNA nucleotides but in RNA.
Step-by-step explanation:
A nucleotide of deoxyribonucleic acid (DNA) may contain deoxyribose sugar, a phosphate group, and one of four types of nitrogen-containing bases. These bases are adenine (A), cytosine (C), guanine (G), and thymine (T). Unlike DNA, ribonucleic acid (RNA) commonly contains uracil (U) instead of thymine. DNA's sugar component is deoxyribose, which is similar to ribose but is missing an oxygen atom.
Therefore, the correct answer to the question "What may a nucleotide of DNA contain?" is "c. deoxyribose, thymine, and a phosphate group". Each nucleotide in DNA is specifically composed of one deoxyribose sugar, one phosphate group, and a nitrogenous base which can be either adenine, cytosine, guanine, or thymine. Nucleotides are essential for storing genetic information and are the building blocks of DNA. They play a crucial role in the replication and transmission of genetic material.