CELL HEREDITY 



N===C— NH2 



H— C2 5C 



8C — H 



II 9/ 



C N 



H — Nt 



;C=0 



H 



-O. 



I I H— C— H 



H H I 



Monomers of the 

 DNA chain 



Deoxyriboadenylic acid 



OH 



O- 



X 



/ 



0^\ 



N — C2 5C- 



> 



C— H 



/ 



NF=X — N 

 I' '1 \ 



0=C2 5C — H 

 N^ -'C— H 



H 



.0. 



Deoxyriboguanylic acid 



c — c \ 



H H 



H— C— H 

 O- 



-OH 



,o/\ 



Deoxyribocytidylic acid 



0=C2 5C — CH3 

 N^ ^C— H 



/ 



H 



c — c 



H H 



H 



I 



\ 



H— C— H 



Deoxyribothymidylic acid 



OH 



X. 



I.lo. Structural formulae of the nucleotides of DNA. 



