Amoeba Sisters
What is ATP?
Table of Contents: 00:00 Intro 0:40 Some Examples of ATP Uses in Cell Processes 1:14 What is ATP? 1:52 How do we get ATP? 3:05 How does ATP work? Note: We received an excellent comment in an older video (about cellular respiration) that...
Crash Course
Biological Molecules - You Are What You Eat: Crash Course Biology
Hank talks about the molecules that make up every living thing - carbohydrates, lipids, and proteins - and how we find them in our environment and in the food that we eat.
Bozeman Science
Signal Transduction Pathways
Paul Andersen explains how signal transduction pathways are used by cells to convert chemical messages to cellular action. Epinephrine is used as a sample messenger to trigger the release of glucose from cells in the liver. The...
Bozeman Science
Lipids
In this video Paul Andersen describes the lipids (of the fats). He explains how they are an important source of energy but are also required to cell membranes. He explains how the hydrocarbon tails in triglycerides contain energy...
Bozeman Science
Biological Molecules
Paul Andersen describes the four major biological molecules found in living things. He begins with a brief discussion of polymerization. Dehydration synthesis is used to connect monomers into polymers and hydrolysis breaks them down...
Bozeman Science
What is DNA?
Paul Andersen describes the molecular structure of DNA. He describes the major parts of a nucleotide and explains how they are assembled into a nucleic acid. The nitrogenous base, deoxyribose sugar and phosphate group make up a single...
Bozeman Science
ATP: Adenosine Triphosphate
Paul Andersen explains the structure, function and importance of adenosine triphosphate (ATP). He begins by describing the specific structure of the molecule and its three main parts: adenine, ribose sugar, and phosphate groups. He...
Curated Video
These are the 4 main types of carbon-based molecules necessary for life
There are 4 main types of carbon-based molecules important to life. They are the building blocks for every living organism on this planet. In this video, I will give you a quick introduction to each type with some fun examples.
Curated Video
Phospholipid
A lipid that contains a phosphate group. Lipid molecules are normally hydrophobic, which means they repel water. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual...
Catalyst University
(NEW!) Glycolysis Part 2 4 The Preparatory Phase & Questions
(NEW!) Glycolysis Part 2 4 The Preparatory Phase & Questions
Curated Video
Understanding DNA and the Genome: The Building Blocks of Life
This video provides an introduction to DNA and the genome. It explains what DNA is, the structure of DNA, and the different components that make up DNA. The video also describes how DNA is coiled up into structures known as chromosomes...
JJ Medicine
Coenzyme A (CoA) Biosynthesis Pathway and Vitamin B5
Lesson on Coenzyme A Biosynthesis and Vitamin B5. Coenzyme A is required for a variety of processes including metabolism of fatty acids and degradation of some vitamins. Coenzyme A is biosynthesized from pantothenic acid (Vitamin B5),...
JJ Medicine
Glycolysis Pathway | Enzymes, Regulation and Products
Lesson on the Glycolysis pathway. In this video, I explain the glycolysis pathway (pathway involved in breakdown of glucose) starting with glucose uptake into the cell, glucose entrapment via hexokinase/glucokinase, examining the energy...
JJ Medicine
Galactose Absorption and Metabolism | Leloir Pathway and Galactosemia
Lesson on galactose absorption, metabolism via the Leloir pathway, and the medical condition known as galactosemia. Galactose is monosaccharide, which is typically ingested in the form of lactose (galactose + glucose) or free galactose...
Professor Dave Explains
Signal Transduction in Immune Cells: Receptor-Ligand Interactions
Now that we know some things about immune cell structure and function, we need to start understanding how these cells interact on the molecular level, and how signals are translated into cellular response. This means looking at...
Ancient Lights Media
Signal Transduction: Light Induced Cellular Change
Plant Physiology and Chemistry Set: 6. This clip shows how, by the process of signal transduction, light is able to bring about chemical responses that result in the expression of genes.
Curated Video
ATP - Energy of the Cell
ATP is the energy currency of the body. In this video, I talk about what ATP is and how it works. I also talk about the scientists that have contributed a lot to what we know about how ATP works.
Professor Dave Explains
Cellular Respiration Part 1: Glycolysis
You need energy to do literally anything, even just lay still and think. Where does this energy come from? Well, food, right? But how? This is one of the most miraculous biological processes, and it happens in our bodies every moment of...
JJ Medicine
Macroautophagy | Regulation During Feeding, Fasting and Starvation
Lesson on macroautophagy and regulation by fasting and starvation, with an additional detailed overview of how macroautophagy is inhibited during feeding and the fed state. Macroautophagy is a nutrient responsive process and is inhibited...
Professor Dave Explains
Gel Electrophoresis
How exactly do molecular biologists figure out all this stuff we have been learning? How do they do science with huge molecules like DNA and proteins? How can we gather empirical data about such molecules? Let's take a look at one...
Professor Dave Explains
Metabolism and ATP
How does your body break down the food you eat to generate the energy you need to get through your day? What form of energy is this, anyway? Let's go over some of the basics of metabolic processes, and introduce ATP, the currency of...
Curated Video
Introduction to Natural Polymers: From Sugars to DNA
The video provides an overview of natural polymers found in all living things. The video explains that sugars are carbohydrates and can be linked together to form polysaccharides in condensation reactions, with examples of starch and...