Hhmi: Biointeractive: Molecular Mechanism of Synaptic Function

Neurons don't touch each other, but they still communicate. Observe the process of both electrical and chemical signals used by neurons to share information. Hear exactly what triggers each step of the reaction as you view an animation...

A comprehensive slideshow illustrating and explaining fat. Learn the structure and impact on the body.

Learn about the geometrical structure of three different viruses, and how these structures affect the function of each virus. [3:22]

Learn how the chemical properties of the DNA molecule determine its structure and function in this video. [2:45]

Using information from molecular research, this 3-D animation shows how DNA is replicated at the molecular level. It involves an enzyme that unwinds the DNA and other enzymes that copy the two resulting strands. [1:07]

Learn how a standard lab technique, polymerase chain reaction, amplifies a single or several copies of a piece of DNA. [0:55]

A fantastic interactive laboratory in which transgenic flies are created and used to study circadian rhythms. Excellent supporting information and resources for teachers and students.

Through a series of videos and narrated animations, learn how evolution affects gene expression in species. Find out how visualizing gene expression can help explain what a specific gene does.

Through video clips, demonstrations, and inquiry learn how the paintbrush gene functions in the process of evolution.

Spread your knowledge of spreadsheets. The first of five tutorials in the Spreadsheet Data Analysis unit introduces the basics of spreadsheets. It shows future data analysts how to organize and format tables, and how to use functions to...