http://www.mayohealth.org/mayo/9306/htm/choleste.htm
This is a very effective presentation from the Mayo Clinic about cholesterol. There are quizzes and drawings as well as an explanation of the effect of high blood cholesterol and heart disease.

http://www.nih.gov/news/pr/nov96/nida-19.htm
This is a fact sheet from the National Institutes of Health on a program to help athletes avoid the use of steroids to build muscle mass.

http://www.chestpainperspectives.com/pages/cpp003markersanddiag.htm
This site from a hospital explains the use of isoenzymes to detect non-typical heart attacks (i.e. atypical myocardial infarctions or AMI’s). It is a little technical but the student should easily see the importance of detecting isoenzymes from the heart to determine if a heart attack has occurred or not.

http://www.nhlbisupport.com/chd1/why.htm
Learning about cholesterol and other types of lipids matters. Check out this page from the National Hear and Lung Institute to find out about cholesterol and heart disease.

http://www.accessexcellence.org/AB/GG/dna_molecule.html
This page has different types of illustrations of amino acids for those that may have trouble understanding how they might look from a three-dimensional perspective.