This video provides an explanation of what a catalyst is and how it can increase the rate of chemical reactions. The concept of activation energy is introduced, and it is explained that catalysts lower activation energy, allowing more...

In this video, we explore the mechanisms of action of drugs affecting some aspect of the clotting cascade including factor Xa, thrombin, and plasmin.

In this video we discuss the theory underlying the Amylase (Starch Hydrolysis) Test and how to interpret the results.

We know that NSAIDs can inhibit both COX-1 and COX-2 enzymes. But these enzymes perform slightly different functions, and it seems that inhibition of COX-2 leads to the beneficial affects of NSAIDs while inhibition of COX-1 leads to the...

Sally’s never-ending field trip continues. This time, they’re exploring the bustling city of Zoo York. Perhaps she’ll travel for the rest of year 11, only returning home for a hot meal and special occasions. This lesson will examine the...

Hey guys! In this video, you will learn what the TCA cycle or Krebs cycle or Citric Acid cycle is and how to remember/memorize it easily by providing tips and tricks on how to remember the pathway. Specifically, I discuss the cycle on a...

Proteins and Enzymes for Anatomy and Physiology

Malic Enzyme Makes NADPH

Lesson on the Branched Chain Amino Acid (BCAA) Metabolism Pathway: Overview of BCAA Catabolism, Breakdown Products, Enzymes and Regulation. Hey everyone, in this lesson you will learn about the metabolism of BCAAs (Valine, Isoleucine and...

Fructokinase

This live-action video program is about white blood cells. The program is designed to reinforce and support a student's comprehension and retention of the term through use of video footage, photographs, diagrams and colorful, animated...

Lesson on Tryptophan Degradation (Metabolism) and the Kynurenine Pathway. Tryptophan is an essential amino acid required for the production of serotonin and melatonin. Tryptophan can be degraded by the kynurenine pathway, which can be...

Lesson on the purine and pyrimidine degradation pathway, the critical enzymes involved in the pathway (xanthine oxidase) and what the body does with the products of pyrimidine catabolism (beta alanine and beta aminoisobutyrate) and...

In this video, we discuss the biosynthetic pathway for vitamin D and how vitamin D exerts its functions at the gene expression level. We also explore the clinical affect of statin therapy on vitamin D levels.

Do you want to learn about nutrition? Metabolism? Medicine and general health? This is the playlist for you! Biochemistry allows us to understand the large biomolecules that run all of our cellular functions, like proteins,...

Peroxisomes and Lysosomes: Intracellular Defense

The video is about protein synthesis, including the stages of transcription and translation. The video also covers the structure of an RNA molecule and how it is involved in protein synthesis. It goes into detail on the two stages of...

The Electron Transport Chain: Complexes I and II

Lesson on Serotonin and Melatonin Synthesis from the amino acid Tryptophan. Tryptophan is an essential amino acid, which is used to produce the monoamine neurotransmitter serotonin and the hormone melatonin. Serotonin is important in...

Lesson on the glucose-alanine cycle (Cahill cycle), how nitrogenous waste is produced in the muscle, how the skeletal muscle “stores” nitrogen in the form of alanine, and how alanine is transported and processed in a liver hepatocyte....

Antibody Function

Enzymes have optimal conditions under which they operate. Temperature, pH, enzyme concentration and substrate concentration are some conditions that affect the rate of reaction. As enzymes are proteins, they have an optimum temperature...

Researchers from the U.S. and Britain say they have created a plastic-eating enzyme that could be used aide in the recovery and recycling of plastics. The enzyme is able to digest polyethylene terephthalate, or PET, plastic. PET plastics...

In this Super Science Rewind, Charlie and Jordan talk about a molecule that can inhibit an enzyme linked with the onset of stroke. The molecule -- developed by research teams at the University of Nebraska-Lincoln and the National...