Crash Course
Nitrogen & Phosphorus Cycles: Always Recycle! Part 2 - Crash Course Ecology
Hank describes the desperate need many organisms have for nutrients (specifically nitrogen and phosphorus) and how they go about getting them via the nitrogen and phosphorus cycles.
MinuteEarth
The Hidden Side Of Proteins
You might already know that proteins are a fundamental part of your diet, but they're much more than that.
Crash Course
Aldehyde and Ketone Reactions - Hydrates, Acetals, & Imines: Crash Course Organic Chemistry
We’ve already learned the basics of carbonyl chemistry and talked about how we can synthesize aldehydes and ketones, but there’s still so much more to learn, like the role carbonyl groups play in reactions involving sedatives! In this...
SciShow
The Deal with Protein
People like to say all kinds of things about protein – like, you need to eat lots of it to build muscle and lose weight. The truth is, the science of protein and how your body uses it is much more complicated than that.
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
Proteins
Paul Andersen explains the structure and importance of proteins. He describes how proteins are created from amino acids connected by dehydration synthesis. He shows the importance of chemical properties in the R-groups of individual...
Bozeman Science
Abiogenesis
Paul Andersen describes how life could have formed on our planet through natural processes. The progression from monomers, to polymers, to protocells and finally to cells is described. The Miller-Urey experiment is described in detail as...
TED-Ed
TED-Ed: The science of macaroni salad: What's in a molecule? - Josh Kurz
What do macaroni salad and gasoline have in common? They are made of exactly the same stuff -- specifically, the same atoms, just rearranged. So, while we put the former in our mouths and the latter in our cars, they are really just...
SciShow
How Cells Got Their Membranes (Maybe) | SciShow News
For life to evolve on Earth, a bunch of complex organic molecules had to evolve a way to assemble into cells. So how did those proto-cells get cell membranes? Some researchers have a new hunch. Also, scientists are borrowing a trick from...
Crash Course
Metabolism & Nutrition, part 1: Crash Course A&P
Metabolism is a complex process that has a lot more going on than personal trainers and commercials might have you believe. Today we are exploring some of its key parts, including vital nutrients -- such as water, vitamins, minerals,...
Bozeman Science
The Secret of Life
Paul Andersen explains how the central dogma of biology explains life on our planet. He starts with a brief discussion of common characteristics of all life. He then explains how DNA is used to make proteins which in turn make you. He...
SciShow
Retroviruses: Microbial Supervillains
Forget your Hans Grubers, Lord Voldemorts, and Hannibal Lecters. It's time to meet some real supervillains. They're called retroviruses, and they actually change their host cell's DNA.
TED-Ed
TED-Ed: How mucus keeps us healthy - Katharina Ribbeck
Your body produces more than a liter of mucus every day, and when you're sick, it can be hard to miss. But what exactly is mucus? And what does it do, besides making you miserable? Katharina Ribbeck reveals the mysteries of this...
Bozeman Science
The Molecules of Life
Paul Andersen describes the macromolecules that make up living organisms. He starts with a brief description of organic chemistry and the importance of functional groups. He also covers both dehydration and hydrolysis in polymerization....
Bozeman Science
The Origin of Life - Scientific Evidence
Paul Andersen discusses scientific evidence of the origin of life on our planet. He begins with a brief discussion of the age of the earth and ends with the future of humanity. He includes geologic, chemical and molecular data.
Curated Video
How Life Began: Understanding Abiogenesis and the Origin of Life
New ReviewDespite the incredible variations of life we see today, at the fundamental level, all living things contain three elements: Nucleic acids, Proteins, and lipids. These three things had to have been present in order for life to start. The...
Curated Video
Complete vs. Incomplete Protein
Howcast - Learn the difference between complete and incomplete protein from DreamBodies' Tony DiCostanzo in this Howcast bodybuilding diet video.
Curated Video
What to Take after a Bodybuilding Workout
Howcast - Find out what to take after a weightlifting workout to help build muscle from DreamBodies' Tony DiCostanzo in this Howcast bodybuilding diet video.
Curated Video
What to Take during a Bodybuilding Workout
Howcast - Find out what to take during a weightlifting workout to help build muscle from DreamBodies' Tony DiCostanzo in this Howcast bodybuilding diet video.
Curated Video
How to Increase Mental Alertness
Howcast - If you want to boost your mental alertness, try a diet rich in the vitamins and minerals necessary for cognitive enhancement.
Curated Video
Isoelectric focusing
Isoelectric focusing (IEF) is a high-resolution technique for separating proteins based on their isoelectric points, utilizing electric fields to focus molecules into sharp zones within a pH gradient. The pH gradient, created using...
Curated Video
Isoelectric point
Proteins, composed of amphoteric amino acids, can carry different net charges depending on the pH of their environment. The pH at which a protein has no net charge is called its isoelectric point (pI), and this varies between proteins...
Great Big Story
Holding the cosmos, an entrepreneur's meteorite collection
Naveen Jain reveals his unique collection of meteorites, showcasing the profound connection between space artifacts and human curiosity.
Curated Video
Protein functions in the human body
Proteins are complex macromolecules that are considered 1 of the 4 macromolecules that make up life. Proteins have many functions beyond being structural components of cells.