Chemical reactions inside of our bodies are made possible by little proteins called enzymes and enzymes help speed up reactions. Breaking down food so our body can use it is an example of one of the jobs they do. (Dugdale, 2011) On an enzyme, there is a thing called an active site, which has a certain shape that goes together with a certain substrate (McGraw-Hill Higher Education, 2006), and they fit together perfectly like a puzzle piece.
Dugdale, D. (2011). Enzyme. Medline plus. Retrieved August 30, 2011, from http://www.nlm.nih.gov/medlineplus/ency/article/002353.htm
McGraw-Hill Higher Education, (2006). How Enzymes Work [Web]. Available from http://highered.mcgraw-hill.com/sites/0072495855/student_view0/chapter2/animation__how_enzymes_work.html
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