Khan Academy
Khan Academy: Biology: Macromolecules: Nucleic Acids: Molecular Structure of Dna
Explore the molecular structure of DNA in this article. Learn about the components of DNA: nucleotide, nitrogenous base, and phosphate.
Vision Learning
Visionlearning: Biology: Dna Ii: The Structure of Dna
Instructional module focusing on the physical structure of DNA. Discussion incorporates the description of the nucleotides, base pairs, and the double helix shape of a DNA molecule. Site also includes an interactive practice quiz and...
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Story Behind the Science
Story Behind the Science: Piecing Together the Structure of Dna [Pdf]
Outlines the history of the scientific efforts that went into the discovery and mapping of the structure of DNA, spanning one hundred forty years.
Khan Academy
Khan Academy: Discovery of the Structure of Dna
Explore the structure of DNA double helix and how it was discovered. Learn about the work of Chargaff, Watson and Crick, Wilkins, and Franklin.
University of Southern California
University of Southern California: Dna Structure
A really nice web page devoted to the structure of DNA. Simple information but nice use of graphics to show the molecule. Uses the CHIME plug-in to show the 3-D nature of the helix.
TED Talks
Ted: Ted Ed: The Twisting Tale of Dna
Video describing the structure and function of the DNA molecule. [4:27] Includes a short quiz and a list of additional resources to explore.
PBS
Pbs Learning Media: Dna Structure and Function: Decoding Watson
Discover how the structure of DNA relates to its hereditary function in these videos from the American Masters film Decoding Watson. The first video, "DNA Structure and Function," [2:07] can be used with all middle and high school...
CK-12 Foundation
Ck 12: The Dna Double Helix Advanced
[Free Registration/Login may be required to access all resource tools.] Students can watch a video, read some informational text and key vocabulary terms, and answer review questions about the structure of DNA.
BiologyWise
Biology Wise: 7 Major Steps of Dna Replication
Explains the structure of DNA and the seven steps that take place during DNA replication. Includes a labeled illustration for each step.
Other
Acadia University: Structure of Dna and Rna
This site from the Acadia University provides the basic structure of DNA and RNA and a decent compare/contrast between the two.
University of California
Ucmp: Computer Model of Dna
A slight departure from the classic view of DNA showing that the molecule is not exactly a twisted ladder. Good image and explanation to go with it.
National Health Museum
Access Excellence: Structure of the Dna Molecule
Read a history of the discovery and study of DNA and its structure. Links to a graphic, other references, and classroom activities.
University of Colorado
University of Colorado: Ph Et Interactive Simulations: Optical Tweezers and Applications
Did you ever imagine that you can use light to move a microscopic plastic bead? Explore the forces on the bead or slow time to see the interaction with the laser's electric field. Use the optical tweezers to manipulate a single strand of...
PBS
Pbs: Watson and Crick Describe the Structure of Dna
From a PBS databank of twentieth-century scientists and their stories comes this brief description of the discovery by Watson and Crick of the double-helix structure of DNA. The work of other scientists on whom Watson and Crick relied...
University of Arizona
University of Arizona: Introduction to Dna Structure
A tutorial on the structure of DNA. Meant as a companion to a biology course, a grasp of basic DNA terminology is essential for the reader.
American Academy of Achievement
Academy of Achievement: James D. Watson, ph.d.
A biography of James Dewey Watson who, along with Francis Crick, discovered the structure of DNA. They were awarded the Nobel Prize for Physiology and Medicine in 1962. Watson was later the first person to lead the Human Genome Project....
Science Buddies
Science Buddies: Extracting Onion Dna
In this project, you'll learn how to isolate DNA from onion cells, separating it from other cellular components in a manner that still preserves its structure and sequence. In the end, you'll have enough DNA to see with the unaided eye,...
TeachEngineering
Teach Engineering: Inside the Dna
Students conduct their own research to discover and understand the methods designed by engineers and used by scientists to analyze or validate the molecular structure of DNA, proteins and enzymes, as well as basic information about gel...
Concord Consortium
Concord Consortium: Science of Atoms and Molecules: Nucleic Acids and Proteins
Through this activity, students work with macromolecules, proteins and nucleic acids. The focus is on the atomic structure of proteins, how linear polymers are made, and the surface charges of the resulting polymers. . Multiple-choice...
TED Talks
Ted: Ted Ed: James Watson on How He Discovered Dna
Nobel laureate, James Watson, discusses the story of how he and his research partner, Francis Crick, discovered the structure of DNA and identified the genetic components for many diseases. [20:15]
PBS
Nova: Journey Into Dna
Investigate the structure and function of DNA using this animated presentation.
Other
My Science Box: Dna Models
Hands-on lesson in which students play with puzzle pieces representing the DNA molecule to discover the molecular structure of DNA.
Oregon State University
Oregon State University: Linus Pauling and the Race for Dna
A great resource for the history of the discovery of DNA! This website includes over 300 documents, photographs, audio clips, and video excerpts that documents how the double helix structure was discovered.