Answer the following question given this paragraph: 

The only difference between each nucleotide is the identity of the base. There are only four possible bases that make up each DNA nucleotide: adenine (A), guanine (G), thymine (T), and cytosine (C).


Q: There are only four possible bases that make up each dna nucleotide: adenine, guanine, thymine, and?

 Choices:

- taurine

- phenylalanine

- guarine

- cytosine

A:
cytosine
