Final answer:
A DNA nucleotide includes three components: a phosphate group, a nitrogenous base (which can be either adenine, guanine, cytosine, or thymine), and deoxyribose sugar, making option (c) the correct answer.
Step-by-step explanation:
A nucleotide of DNA may contain a phosphate group, a nitrogenous base, and a deoxyribose sugar. Thus, the correct choice is (c) deoxyribose, thymine, and a phosphate group. DNA nucleotides are composed of these three critical components: the sugar molecule deoxyribose, a phosphate group, and a nitrogenous base which can be either a purine (adenine or guanine) or a pyrimidine (cytosine or thymine).
This structure contrasts with RNA nucleotides, which contain the sugar ribose instead of deoxyribose and may include uracil as a nitrogenous base in place of thymine. It's important to notice the slight difference in the sugar molecule between DNA and RNA; DNA has deoxyribose which lacks one oxygen atom at the 2' position compared to the ribose sugar found in RNA.