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 describe how an enzyme is used to turn substrate into product. It is 4 of 5 in the series titled "Enzyme Function."

This lesson will describe that enzymes are made of proteins, and can be found in nature or can be synthesized synthetically. It is 4 of 4 in the series titled "Enzyme Structure."

This lesson will describe that enzymes are made of proteins, and can be found in nature or can be synthesized synthetically. It is 2 of 4 in the series titled "Enzyme Structure."

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

This lesson will identify the structure and function of enzymes.

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

Explains how rennin is produced and why it is important in the human body. Describes some other uses of rennin and how it is sometimes confused with a different enzyme named renin.

Learn about restriction digestion, where the result has sticky ends and blunt ends. Also find out about ligation reactions.

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.

Slideshow notes introduce enzymes: their purpose, process, and importance.

Several animations illustrating how enzymes catalyze chemical reactions. Examine how temperature affects the enzymes and how toxins can alter the shape of the enzymes.

Searchable database of restriction enzyme information. Must have more than basic knowledge of restriction enzymes.

This tutorial takes a brief look at enzyme activity and how enzymes work as catalysts.

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 information page about activation energy. Learn about activation energy, transition states, and reaction rates.

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

Explore the first and second law of thermodynamics as it applies to the body in this article.

In this article, read all about the relationship between spontaneity and equilibrium to the Gibb's free energy change.

Investigate ATP structure, ATP hydrolysis to ADP, and reaction coupling in this article.

Students perform DNA forensics using food coloring to enhance their understanding of DNA fingerprinting, restriction enzymes, genotyping and DNA gel electrophoresis. They place small drops of different food coloring ("water-based paint")...