Cold Spring Harbor Laboratory
Dolan Dna Learning Center: Dna Molecule: Chargaff's Ratios
Learn about base pairing in DNA, and how the ratios of adenine to thymine and guanine to cytosine are equal. [0:47]
National Health Museum
Access Excellence: Dna Molecule Two Views
Access Excellence provides an excellent graphic showing the structure of the DNA molecule and its components.
Cold Spring Harbor Laboratory
Dna Interactive: Genome
This site is provided for by DNA Interactive. The genome is the entire endowment of genetic information. It is the "Book of life," on an organism. This site demonstrates the methods used to map and sequence the human genome and to...
Other
I Can Do That: Dna Introduction
In story form, this complete site examines what DNA is, the structure of DNA, genes, and replication. For clarity purposes, the text is supplemented with drawings.
University of Utah
University of Utah: Learn Genetics: Build a Dna Molecule
Build a short strand of DNA using the base pairing rule. An interactive learning experience that reinforces the base pairing rule.
Other
National Center for Biotechnology Education: Dna50: Cut Out Model
Students construct DNA base pairs using a template. The base pairs can be used to assemble a large-scale DNA strand for the whole class.
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.
Curated OER
Science Kids: Science Images: Dna Structure
A 3D computer generated model of humans DNA structure. The double helix image labels base pairs, diameter, major and minor grooves.
BioMan Biology
Bio Man Biology: Life Chemistry Quizzes
Two multiple-choice quizzes, one on the processes and types of biological molecules, the other on the structure and replication of DNA.