Question

the dna chain is made of base pairs of nucleotides. nucleotides are made of three parts: a sugar, a phosphate and a base which of the following is a nucleotide found in dna? a adenine + phosphate group + thymine b cytosine + phosphate group + guanine c deoxyribose + phosphate group + polymerase d deoxyribose + phosphate group + cytosine

Explanation:

A nucleotide in DNA consists of deoxyribose (sugar), a phosphate group, and a nitrogenous base (adenine, thymine, cytosine, or guanine). Option A has two bases (adenine, thymine) and a phosphate, missing sugar. Option B has two bases (cytosine, guanine) and a phosphate, missing sugar. Option C has deoxyribose, phosphate, but polymerase (an enzyme, not a base). Option D has deoxyribose (sugar), phosphate group, and cytosine (base), matching the nucleotide structure.

Answer:

D. deoxyribose + phosphate group + cytosine