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Enzymes: Nature's Factory Workers


What are Enzymes?

What are Enzymes? Explained using animated video.

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Enzymes: Catalysis, Kinetics & Classification – Biochemistry | Lecturio

This video “Enzymes: Catalysis, Kinetics & Classification” is part of the Lecturio course “Enzymes and Enzyme Kinetics” ► WATCH the complete course on

1. Background
- Types of enzymatic reactions
- Enzymes bind substrates
2. Steps in catalysis
- Activation of Energy
- Mechanism of catalysis
- Specificity of cutting
3. Serine Proteases: Catalytic Mechanism
- Cleave peptide bonds
- Common active site composition/structure
- Mechanistically well studied
4. Kinetic considerations
- Michaelis menten

Kevin Ahern received his B.S. and M.S. degrees from Oklahoma State University, and a Ph.D. in Biochemistry from Oregon State University. Currently he is working as professor of biochemistry and biophysics at Oregon State University. He is also a co-author of the popular biochemistry textbooks, “Biochemistry Free and Easy”.

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Definition and Function of Enzymes

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Enzymes (Updated)

The Amoeba Sisters explain enzymes and how they interact with their substrates. Vocabulary covered includes active site, induced fit, coenzyme, and cofactor. Also the importance of ideal pH and temperatures for enzymes are discussed. This video has a handout here:

The Amoeba Sisters videos demystify science with humor and relevance. The videos center on Pinky's certification and experience in teaching biology at the high school level. For more information about The Amoeba Sisters, visit:

We cover the basics in biology concepts at the secondary level. If you are looking to discover more about biology and go into depth beyond these basics, our recommended reference is the FREE, peer reviewed, open source OpenStax biology textbook:


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Co-factors and Co-enzymes: Enzymology 101

This is a quick video describing the concept behind coenzyme and cofactor.

5. Enzymes and Catalysis

MIT 5.07SC Biological Chemistry, Fall 2013
View the complete course:
Instructor: JoAnne Stubbe

In this classroom lecture, Professor Stubbe focuses on enzymes as catalysts. She describes the theory and mechanics of catalysis and explains why enzymes are so important.

License: Creative Commons BY-NC-SA
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Enzymes and How They Work: An Introduction

All living things are kept alive by doing chemical reactions. In fact, some estimate that your body performs around 500 quadrillion reactions per second. That’s a lot!

These reactions are what keep you alive, and are done by special molecules called enzymes! So, enzymes are super important! NO enzymes, no life!

So, what are enzymes? Enzymes are PROTEINS that speed up chemical reactions to make them happen.

Here’s how they work:
The Pac-Man looking thing on the left is an enzyme. Notice that it has a little triangular region (that looks like its mouth). That is called the active site and it is where the reaction happens.

On the right we have a molecule in the shape of a triangle. It is called the SUBSTRATE. This is the molecule that will undergo a chemical reaction.

Notice that the substrate fits perfectly into the active site of the enzyme (just like a puzzle piece). Each enzyme can only work on specific substrates, to do specific chemical reactions, so we say that enzymes are specific. When the substrate enters the active site, the enzyme weakens the chemical bonds in the substrate, causing the chemical reaction to happen. The molecules that are produced by the reaction are called PRODUCTS.

The enzyme is not altered by this reaction and can be used again and again.

Although this animation showed an enzyme breaking down a substrate, there are other enzymes that do the opposite. They take substrates and join them together to make a larger product.

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Enzymes - What Are Enzymes How Do They Work - Functions Of Enzymes In The Body

In this video I discuss what are enzymes, the functions of enzymes and I also discuss what do enzymes do? I cover how enzymes work by describing the sucrase enzyme in action.


What are enzymes? Let’s take a look.

So, for example, let’s say you were to eat something that had sugar in it. Well, in the intestine the sugar molecule, also known as sucrose, would encounter an enzyme called sucrase. And this sucrase molecule would come in and unbind the sugar molecule to its more basic components of glucose and fructose.

Enzymes are able to do this chemical reaction very quickly, so you can see they play an important part in our body. Each type of enzyme has a particular job, and most enzymes have only one job to do.

We have already seen that sucrase unbinds a sugar molecule, lipase, which is a digestive enzyme that breaks down fat molecules into fatty acids and monoglycerides.

Enzymes are protein molecules. And they have what is called an active site, which is a region where a substrate molecule binds to, the term substrate is used to describe a molecule that an enzyme is acts upon.

This process is sometimes described as a lock and key model. Once the enzyme and the substrate bind, pow! The chemical reaction occurs, and the enzyme has done its duty.

Introduction to enzymes and catalysis | Chemical Processes | MCAT | Khan Academy

Let's explore what enzymes are, and how they can affect a reaction. The most important affect you need to know is its ability to catalyze the reaction. By Ross Firestone.Created by Ross Firestone.

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Enzymes: Nature's Factory Workers

What are enzymes? Why they're nature's little factory workers. They chop up certain things! They build up others! Pretty amazing the kind of chemistry nature can do given enormous polypeptide chains with unfathomable variability and billions of years of evolution, no?

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Enzymes- a fun introduction

Developed by the cool folks at Don'tTellTeacher, this is a fun animated show that introduces students to a biology topic called Enzymes. It's a pilot run exploring the use of humorous cartoons to make science more engaging for 11 to 13 year olds. Your valuable feedback is much appreciated.
DISCLAIMER: Sheila Marsh is a fictional character and is not affiliated to Stanford University.

Nature's Factory & Culinart

Nature's Factory & Culinart unen fuerzas para crear un recetario increíble. Pide el recetario por nuestro facebook. Cocina a tu gusto cualquiera de las recetas.

Enzymes - Biochemistry

How do enzymes enable cells to live?
How do catalysts help you survive?

Vocabulary Focus; enzyme, substrates

For more and text version available

Nature's Factory en Denny's - Grupo Idrapower

Biomolecules - Enzyme - Chemical Nature of Enzymes

Most of the enzymes are protenacious in nature. Some enzymes work as simple proteins where as others need a non protenatious part which is called a co-factor.

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Enzyme Review

How the enzyme works!

Nature of enzymes

Subject :Zoology

Course :2nd Year / Paper IV


Enzymes - Characteristics of enzymes

Enzymes - Characteristics of enzymes
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Nature's Factory Road to health



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