Enzymes create the conditions needed for biochemical reactions to happen fast. The general name that chemists use for a chemical entity that increases the speed of a reaction is a "catalyst." Enzymes are biological catalysts - they...

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.

Explore enzymes in this tutorial.

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

Discusses the properties of enzymes and the concept of enzyme-substrate specificity, and how a substrate molecule binds to an enzyme to form an enzyme-substrate complex. An overview of enzyme-substrate reactions is also presented.

Explains what enzymes are, the three broad categories, their working mechanism and two theories developed to explain this, and factors that impact enzyme activity.

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...

Every enzyme has an optimal pH value at which it functions best. This article explains why pH has an effect on enzyme activity and how it affects them.

This lesson will identify the structure and function of enzymes.

What are enzymes? Discover how enzymes work and learn about the different types.

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.

Explains sources of rennin and what its functions and uses are.

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...

Sometimes science can be really messy or use pretty disgusting ingredients. That is what it takes to understand how the world works, even if the experiment isn't pretty. If you like chemical reactions that stink and ooze foamy bubbles...

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...

Ever used a pair of molecular scissors? Restriction enzymes are molecular scissors that cut DNA into pieces. Find out which enzymes will cut, and where by making a restriction map. Then you can figure out what will happen if you change...

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.

NADH and NADPH are enzymes involved in cellular processes. Explains how NADH participates in catabolic reactions where energy is released and NADPH is involved in anabolic reactions where energy is consumed. Their functions and chemical...

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.

Here is a basic project for investigating enzymes that prevent gelatin from solidifying. This way you can understand why it is some fruits are not recommended for inclusion when it comes to making gelatin.

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...