C.2.5

=**Question: List the major functions of proteins in the body**.= Proteins constitute about 15% of our bodies, and they perform many functions in the human body. Function
 * Provide **structural integrity and strength** for many types of tissue (__muscle__, __hair__, and __cartilage)__

[[image:fi_pro.png align="right" link="http://content.answers.com/main/content/wp/en/thumb/f/fa/79px-Collagentriplehelix.png"]]

 * Can act as **Biological Catalysts**. (Enzymes)
 * Increase the rate of biological reactions, which would otherwise be so slow that life would not be possible.
 * Act as a **Source of Energy**
 * Transport of oxygen (by hemoglobin)


 * [[image:protein.gif align="center" link="http://student.biology.arizona.edu/honors98/group2/protein.gif"]]

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