Biology
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Nucleotide
Deoxyribonucleic acid:

Adenine
Cytosine
Guanine
Thymine

Ribonucleic acid:

Adenine
Cytosine
Guanine
Uracil
Abbreviation

A
C
G
T



A
C
G
U
These are the bases that link together in the deoxyribonucleic acid and ribonucleic acid.
Base

Purine base
Pyrimidine base
Purine base
Pyrimidine base



Purine base
Pyrimidine base
Purine base
Pyrimidine base
Formula

C
5H5N5
C
4H5N3O
C
5H5N5O
C
5H6N2O2



C
5H5N5
C
4H5N3O
C
5H5N5O
C
4H4N2O2
Molecular Weight

135.14
111.1
151.13
126.11



135.14
111.1
151.13
112.09
In deoxyribonucleic acid adenine pairs with thymine and cytosine pairs with guanine. In ribonucleic acid, however, there is no thymine, which is replaced by uracil.