Nachos are delicious. And versatile because today they're also going to help us learn a thing or two about your digestive system. Nachos can provide us with energy and raw materials, by first ingesting something nutritious, propelling it...

This narrated screencast explains the role enzymes play in cellular metabolism. [4:42]

Learn about enzyme structure, and the complex proteins which make up enzymes. [0:39]

Listen to this podcast introducing the function of enzymes in the human body. [0:38]

Enzymes as catalysts for reactions in biological systems; discussion of substrates, active sites, induced fit, and activation energy. [8:12]

Learn about the proteins that can help enzymes catalyze reactions known as cofactors and coenzymes. [9:59]

A video exploring how to use Gibbs free energy to figure out if a reaction is going to be spontaneous or not which is helpful in biology. [9:18]

Learn how endergonic, exergonic, exothermic, and endothermic reactions play a role in biological reactions. [11:52]

A video reviewing over the six types of enzymes and how they catalyze reactions. Learn how you can figure out the function of an enzyme from its name. [7:03]

Video talks about how allosteric regulation can affect enzyme kinetics. [6:04]

A video describing how enzymes function as a reaction catalyst. The video shows how enzymes work through animated examples. [1:15]

This lesson will describe how an enzyme is used to turn substrate into product. It is 1 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 1 of 4 in the series titled "Enzyme Structure."

This lesson will describe the process of induced fit, and explain how enzymes use it during chemical reactions. It is 3 of 3 in the series titled "Induced Fit."

This lesson will show that each enzyme fits to a specific structure using the lock and key model. It is 1 of 4 in the series titled "Lock and Key Model."

This lesson will define activation energy and explain how to determine the amount of activation energy from an energy diagram. It is 5 of 5 in the series titled "Activation Energy."

This lesson shows that an active site is the space on an enzyme where a substrate would attach. It is 2 of 4 in the series titled "Active Site."

This lesson shows that an active site is the space on an enzyme where a substrate would attach. It is 1 of 4 in the series titled "Active Site."

This lesson will describe that a catalyst is something which can speed up a reaction by lowering activation energy. It is 3 of 4 in the series titled "Catalyst."

This lesson will introduce the two types of inhibition found in enzyme interactions: Competitive Inhibition and Noncompetitive Inhibition. It is 3 of 4 in the series titled "Competitive and Noncompetitive Inhibition."

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

Paul Andersen explains how enzymes are used to break down substrates. The correct shape of the active site allows a key/lock fit between the enzyme and the substrate. The enzyme catalase is used to break down hydrogen peroxide. The...

Paul Andersen starts with a brief description of enzymes and substrates. He then explains how you can measure the rate of an enzyme mediated reaction. Catalase from yeast is used to break hydrogen peroxide down into water and oxygen. He...