In a 15 minute video, Paul Andersen describes the four major biological molecules found in living things. There are links to two worksheets and a transcript of the videoso you can create your own guided notes for students to complete while watching the video.

Learn about DNA. Deoxyribonucleic acid is the blueprint for all living things, but it is so small we can’t usually see it. The role of DNA is to provide our cells information on building proteins; these proteins lead to our individual traits such as eye color, height, dimples, and so much more. The structure of DNA is a double helix and we can model this structure at home. This model is based on the work of Rosalind Franklin, a British Chemist who created an X-ray photograph that provided evidence of the double-helix structure of DNA molecules. We can also extract DNA from a living thing, such as a strawberry, at home. The components of this DNA are so small that it does not look like our model; however, with technology scientists can both see the structure and manipulate the structure to change proteins in organisms. The key concepts and terms explored in this episode include DNA, nucleotides, genes, and genetically modified organisms (GMO's).