Biological systems are dependent on the proper functioning of enzymes. Specific enzymes act to aid specific reactions. Enzymes achieve this specificity through differences in the shape and composition that reflect genetic differences (i.e., differences...

The active site of an enzyme contains the catalytic and binding sites. The structure and chemical properties of the active site allow the recognition and binding of the substrate. The active site is usually a small pocket at the surface of the enzyme...

There is a plethora of Internet sites that provide curriculum-oriented materials for students in grades 4-8. Most educators, including teacher-librarians, have their stock list of favorites. This article attempts to provide some additional activity sites to add to your list. These sites operate...

It's an unlikely scenario: Pop stars meet computer geeks meet United Nations development workers. Together, these unusual partners come up with an ambitious plan to fight world hunger and poverty. Odd as it sounds, that's precisely the strategy behind NetAid, a project that...