C
Cytosine H
H
N C
H
C
N
C
H
C
N
O
H
G
Guanine O
H C
N
N
C
C
C C
N
N
N
H
H
H
A
Adenine H
H
N C
N
C
N C
N
C
C
N
H
U
Uracil O H
H
C
C
C
N C
N
H
O
H replaces Thymine in RNA
RNA Nitrogenous Bases
project number_ 01 02 03 04 05 06 07 08 09 10
project_ PLURAL_ HUMAN CLONING
RIBONUCLEIC AC
p g . 129