Hank introduces us to that wondrous molecule deoxyribonucleic acid - also known as DNA - and explains how it replicates itself in our cells.

You might know that chickenpox and shingles are both caused by the same virus, varicella zoster. Here's why the symptoms, and even the vaccines, are different the second time around.

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...

Our DNA stores the information that makes us who we are, but that's not all it can do! There are applications for DNA that go way beyond its use for life, like storing data and folding it into complicated shapes.

This video focuses on general functions of biomolecules. The biomolecules: carbs, lipids, proteins, and nucleic acids, can all can have important functions in the body. However, this video is not giving human dietary guidelines and...

Explore DNA structure/function, chromosomes, genes, and traits and how this relates to heredity! Video can replace old DNA structure & function video and in addition covers foundational concepts of heredity. Table of Contents: Video...

Paul Andersen describes the important characteristics of viruses. He starts with a brief description of origin theories. He then describes the two characteristics of all viruses; genetic information and protein coats. He also...

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...

Hank introduces us to that wondrous molecule deoxyribonucleic acid - also known as DNA - and explains how it replicates itself in our cells.

Reviewing organic compounds

short video bichemist makeup of cells - lipids, protein, nucleic acids, carbohydrates for middle school science

Although early scientists knew heredity came from within organisms, they couldn't initially identify the genetic material until pivotal experiments like those of Griffith and later Hershey and Chase. In 1952, Hershey and Chase used...

A nuclear reaction in which two atomic nuclei fuse to form a larger one.
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A Twig Science
Glossary Film.
Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions. Twig...

Or ribonucleic acid, is a nucleic acid, similar to DNA.
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A Twig Science
Glossary Film.
Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions. Twig Science Glossary...

A class of large polymer molecules consisting of repeating units called nucleotides.
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A Twig Science
Glossary Film.
Key scientific terms defined in just 60 seconds using stunning images and concise textual...

A very small infectious agent that can reproduce only inside other cells.
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A Twig Science
Glossary Film.
Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions. Twig...

Deoxyribonucleic Acid, the molecule that stores and passes on genetic information that determines how an organism develops and functions.
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A Twig Science
Glossary Film.
Key scientific terms defined in just 60...

Delve into the microscopic world of viruses, learning about their structure, how they differ from living organisms, and their methods of infecting host cells. Understand the components of a virus, including nucleic acids (DNA or RNA),...

This video covers:

- Examples of polymers that occur naturally, inclu
ding:
- Polypeptides, which are made of a
mino acids
- DNA, which is made
of nucleotides
- Carbohydrates, which
are made of sugars
-...

Interaction between cosmic rays and early life-forms may be responsible for the fundamental property of chirality, or “handedness,” in biological molecules.

This video is part of a series in which we do an overview of metabolism and pathways. Specifically, this video covers pathways associated with the citric acid [Krebs] cycle including glutamate/glutamine metabolism and nucleotide...

In this video, we learn about the role viruses have played in shaping human existence throughout history. We also learn about the characteristics of viruses, such as their small size and their need for living cells to reproduce. It also...

There are two main types of pathogens we will be focusing on in this series. The first was bacteria, and we just wrapped up a good amount of information on those. The next is viruses. These little things are much tinier than bacteria,...

Explain the process of digestion of each food component. Describe how and where various components of food are absorbed.