Enzymes speed up chemical reactions by factors of at least a million. This project investigates some of the factors that affect how fast enzymatic reactions occur.

In this activity, you will simulate an enzymatic reaction and explore what factors affect the activity of an enzyme.

In this science activity, you will investigate the enzyme called catalase to find out how it helps to protect your body from cell damage.

This site is a retired biology professor's explanation of restriction enzymes. Good visual showing examples of how enzymes cut DNA to produce blunt or sticky ends.

Explains what is meant by enzyme activity and the factors that impact on their ability to function. Looks at temperature, pH value, substrate concentration, enzyme concentration, the presence of inhibitors, and allosteric factors that...

This lesson will identify the structure and function of enzymes.

Learn about the ELISA test in this learning module. Explore how the Enzyme Linked Immunosorbent Assay (ELISA) test can be used to see if certain antigens are present.

This is a basic project on the effect of enzymes on apple slices. The goal of the project is to monitor enzyme activity by measuring the amount of apple juice released by pectinase.

An article that reviews over the different types of energy: kinetic, potential, and chemical.

Discusses what happens during DNA replication and describes the prime replication enzymes found in eukaryotes.

Do this activity to find out how to make milk curdle.

This virtual laboratory demonstrates how an enzyme-linked immunosorbent assay (ELISA) is carried out and some of the key experimental problems that may be encountered. Students will learn about the assay procedure and the equipment and...

Pizza, milk shakes, and ice cream sundaes all contain dairy products, therefore they cannot be eaten by the majority of people around the world. Dairy products contain the sugar molecule lactose, and the majority of people on the planet...

Learn the roles of DNA polymerases and other replication enzymes. Understand the leading and lagging strands and Okazaki fragments.

Students explore the shifting role of senescent cells throughout the lifespan of organisms. The article discusses cancer, Judy Campisi, and enzymes. The resource consists of pictures, quotes, and links to additional resources.

Take a look inside the human body's digestive system. This site features diagrams of the digestive tract and each part is accompanied by labels and descriptions. Just select an organ by moving the mouse over its image.

Practice for the MCAT by answering questions on Glucose-6-Phosphate Dehydrogenase Deficiency.

Read about phenylketonuria and the tests used to diagnose it in those who might have inherited this recessive trait.

Experiment with factors that affect the activity of the weed killer Roundup. The Science Buddies project ideas are set up consistently beginning with an abstract, objective, and introduction, followed by a section on terms, concepts, and...

Students learn about the main digestive roles of the liver, pancreas, and gallbladder, and identify three main features of liver histology that are critical to its function.

In this module, find out the locations and primary secretions involved in the chemical digestion of carbohydrates, proteins, lipids, and nucleic acids.

This site provides an overview of the role of energy in chemical reactions.

Lesson explores scientific principles in using eggs as a highly nutritious and versatile food source of protein.

This article, written for younger readers, explains cystic fibrosis (CF), an inherited disease that causes the body to produce mucus that's extremely thick and sticky.