Enzymes break down nutrients, which makes them perfect for cleaning products, but how do scientists know which ones to include? The short video explains how enzymes work and why. It details the pros and cons of different enzymes in...

How do you make an enzyme stop working? The video explains the process of denaturing enzymes. It lists many uses for this process and examples that young scientists understand from experience.

Using a catalyst to reduce reaction times is often necessary for a reaction to be profitable. But are all catalysts safe? The sixth installment in a 12-part Green Chemistry series has learners explore the role of catalysts in industrial...

It takes about seven seconds for food to move from the mouth to the stomach. Pupils follow food from the mouth through digestion, exploring where mechanical and chemical digestion occur. Saliva, enzymes, acids, and chyme are a small...

The stomach can hold 1.5 liters of food, which remains there for two to three hours in order for digestion to complete. The 33rd video in a series of 47 covers the process of digestion. Classes learn why digestion occurs, about the...

It is safe to say that everything is best in moderation—including preservatives in food. Microbes and oxidation are the main reasons foods become spoiled. Thanks to preservatives, our foods end up having a longer shelf life. But what...

Why do some people look young at age 60 while others look old at age 30? Elizabeth Blackburn discovered it is all related to telomeres and telomerase. Her discoveries have not only led to a better understanding of aging, but also to a...

How many times should a person pee a day? Is it a bad habit to hold it? What makes us have to go pee? These questions are answered in an informative video about the urinary system, and the importance of urinating at the first sign of...

Explore the bacteria at Yellowstone to introduce molecular biology. Scholars learn about the process of genetic engineering and how it has progressed over time, including the identification of the breast cancer genes and the main...

Young biologists explore the theories of DNA replication, learning about the Meselson-Stahl experiment and how it proved DNA replication through semiconservative replication. The video reviews the parts of DNA and then delves...

Hydrogen peroxide bubbles might look painful on a cut, but they are actually doing an important job. The video explores enzymes by allowing learners to see active sites on enzymes and how substrates, like a key fitting a lock, fit...

What occurs once a substrate binds to a protein? High schoolers view a short animation to witness the action of substrate binding and the resulting changes that occur in the protein. They conclude the video with a short discussion...

How can you quickly demonstrate the concept of enzymes and their activity within a cell, specifically increasing the timeliness of a chemical reaction? Individuals view a short video that demonstrates this concept in graphic animation...

Has your class ever wondered exactly what jump starts chemical reactions within the body? Pupils view a short video segment that animates a chemical reaction, complete with enzymes and substrates, so they may further understand this...

Hey Ligase, what have you been up to? Just making ends meet. Watch a video that uses cartoon graphics to teach DNA replication in a clear and concise manner. It begins with the where and when, then covers helicase, primase, DNA...

What did the enzyme tell her substrate? You complete me! An instructive video uses a great comparison of enzyme shape and function to the game Pac-Man. After explaining the concepts, the resource offers a real-world example...

We are all born with one, but how many people actually know what the pancreas does? Follow along with a short video as it examines the important role this often-overlooked organ plays in digesting food and maintaining...

Did you know that different types of food are digested in different parts of the body? Proteins are primarily digested in the stomach, fats in the small intestine, and carbohydrates begin to break down in the mouth. This highly...

Nutritionist Radhia Gleis explains what metabolism is and how to assess it. Food is processed and used by the body producing waste in the end. The steps of the digestive system are explained from its beginning in the mouth to its end in...

A quick, detailed explanation of digestion is given alongside textbook drawings of the mouth and intestines. This video would most likely help higher learners since there is no animation or simple explanations. Using scientific...

The purpose of this video lesson is to expand the student's knowledge about enzymes by introducing the antioxidant enzymes that are intimately involved in the prevention of cellular damage and eventual slowing of the aging process and...

Learn about the function of enzymes in biological systems in this video. Video overviews active sites, substrates, induced fit, and activation energy. [8:12]

This video discusses competitive inhibition and how inhibitors compete with an enzyme for a substrate. [6:29]

A video discussing how noncompetitive inhibitors function. [4:54]