Explore the four biomolecules and their importance for organisms and the structure and function of their cells! This 2023 UPDATED Biomolecules Amoeba Sisters video has some more detail and improved art from the 2016 Amoeba Sisters...

Slime can be great, but when it's the wrong kind of slime (you know, the kind that can kill you?), it gets added to the list of things Hank wishes he didn't have to worry about. Scientists call it biofilm, and it's a type of bacterial...

Mr. Andersen talks you through the diffusion demo. After you finish watching this video you should be able to rank the following from smallest to largest: starch, glucose, water, IKI and the pores in the dialysis tubing.

Paul Andersen describes the defining characteristics of the domain Eubacteria. He begins with a quick description of the phylogeny of bacteria and horizontal gene transfer. He then surveys the structures of a bacteria; nucleoid region,...

Mushrooms can be pretty weird! Some have the power to trick animals into caring for them, appear to bleed, or even clean up radiation!

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Polysaccharides are large carbohydrates that have different structures and functions in humans and other living organisms. Starch, cellulose and glycogen are the 3 main types of polysaccharides we usually talk about when we learn about...

One of the major processes in metabolism, involving the breakdown of large molecules to smaller ones with the release of energy.
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A Twig Science
Glossary Film.
Key scientific terms defined in just 60 seconds...

Polysaccharides: Chitin

Now that we know about simple sugars, we need to know about how these polymerize to form long polysaccharide chains, like cellulose, starch, and glycogen. Check it out!

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...

Animation of rotating Cellulose molecule

Animation of rotating Starch molecule