Explore information about enzymes in the science of biology including what they do, how they work, and things that affect enzyme activity.

Explore practical uses of genetic engineering techniques to generate a plant that produces a hepatitis B protein for potential vaccine use. Examine the use of restriction enzymes for cloning and plasmid mapping.

Through a series of videos and narrated animations, learn how evolution affects gene expression in species. Find out how visualizing gene expression can help explain what a specific gene does.

A great step by step site for how DNA is prepared and plated in the process of electrophoresis.

Problem sets, tutorials, and activities related to biochemistry.

Read answers and questions about Lyme disease from The American Lyme Disease Foundation which fall under the follwing categories: "Chronic Lyme disease/post-Lyme syndrom," "Prevention," "Risk Assessment," "Testing," "Tick ecology," "Tick...