Thought this 3 minute link might be of interest. The complexity is amazing. A further 8 minute explanation along with video is also available.

http://www.youtube.com/watch?v=BtZEqQ1cpmk

Mitosis

http://www.youtube.com/watch?v=VlN7K1-9QB0&feature=related

DNA replication, 2 minute video

http://www.youtube.com/watch?v=teV62zrm2P0&feature=related

Transcription and translation, 4 minutes

http://www.youtube.com/watch?v=41_Ne5mS2ls&feature=related

Molecular Visualizations of DNA
http://www.youtube.com/watch?v=4PKjF7OumYo&feature=related

Pretty amazing.