Sources

http://www.rsc.org/Education/Teachers/Resources/cfb/carbohydrates.htm

http://www.botanical-online.com/english/carbohydrates.htm

http://www.coffeechemistry.com/images/stories/chemistry/carbohydrates/carbohydrate-molecule.gif

http://i.stack.imgur.com/YS0H3.gif

http://api.ning.com/files/xO6ybWgUbfFlk7GUXm9d8dfR--U-fUdPOJEtDzVGgDY_/aminoacidstruc.jpg

http://www.news-medical.net/health/What-are-Lipids.aspx

http://www.medicinenet.com/script/main/art.asp?articlekey=4168

http://www.infoplease.com/cig/biology/proteins.html

http://www.chem4kids.com/files/bio_nucleicacids.html

https://www2.chemistry.msu.edu/faculty/reusch/VirtTxtJml/nucacids.htm

http://biology.about.com/od/molecularbiology/a/nucleicacids.htm