(a)+About+enzymes

__About Enzymes__

** Definition --> ** __Enzymes__ have extremely interesting properties that make them little chemical-reaction machines. The purpose of an enzyme in a cell is to allow the cell to carry out chemical reactions very quickly. These reactions allow the cell to build things or take things apart as needed. This is how a cell grows and reproduces. At the most basic level, a cell is really a little bag full of chemical reactions that are made possible by enzymes.

Note: Enzymes are made from **amino acids**, and they are **proteins**.


 * Definition --> **__Active Site__ is a region on an enzyme that binds to a protein or other substance during a reaction.



media type="youtube" key="V4OPO6JQLOE" height="315" width="420" align="center"


 * Without enzymes, reactions would be really slow because --> **the body is essentially a "chemical processing plant", all enzymes are crucial in every aspect of physiology. All enzymes have certain characteristics in common, which enable them to be effective.

(3) Why are enzymes so specific?

(4) What are some of the differences between the enzyme pepsin & the enzymes on the membrane of mitochondria?

**__ Work Cited __**
 * "HowStuffWorks "How Cells Work"" //HowStuffWorks "Science"// Web. 05 Oct. 2011. [].
 * "Enzyme - YouTube." //YouTube - Broadcast Yourself.// Web. 05 Oct. 2011. [].


 * "Enzyme Characteristics." //Biology in Motion//. Web. 05 Oct. 2011. [].