Chemistry · Chemistry of Life
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Which one of the following nitrogen bases is not present in DNA?
- A
Adenine
- B
Guanine
- C
Uracil
- D
Cytosine
Uracil is a nitrogen base present in RNA but not in DNA. In DNA, the nitrogen bases are adenine (A), guanine (G), cytosine (C), and thymine (T). Uracil replaces thymine in RNA.
Adenine is one of the four nitrogen bases present in DNA.
Guanine is also one of the four nitrogen bases present in DNA.
Uracil is a nitrogen base present in RNA but not in DNA. In DNA, the nitrogen bases are adenine (A), guanine (G), cytosine (C), and thymine (T). Uracil replaces thymine in RNA.
Cytosine is one of the four nitrogen bases present in DNA.
Tagged under Chemistry · Chemistry of Life · 2016