Links
[1] https://www.hootsgo.org/?q=node/6318
[2] http://www.engr.ucsb.edu/~shell/che170/DNA-notes.pdf
[3] http://www.vcbio.science.ru.nl/en/virtuallessons/cellcycle/trans/
[4] http://www.slideshare.net/jamiehworkman/dna-replication-transcription-and-translation