An up-close look at Salmonella. [0:37]
Comparisons of bacteria and viruses with standard cells. [1:43]
A first-hand account of AIDS and HIV in South Africa. [2:19]
A first-hand look at HIV/AIDS in South Africa. [3:05]
A fascinating interactive laboratory in which simulations allow students to explore techniques of cardiac diagnosis and learn about cardiac structure/function. Excellent supporting information and resources for teachers and students.
A brief video explaining the life cycle of the mosquito. [1:16]
Four decades of research on finch species that live only on the Galapagos Islands illuminate how species form and multiply. [15:54] An interactive version of the video with embedded questions for students is available through a link in the text on the main page.
This video illustrates how a small molecule binds to a protein. As a result of the binding, the protein alters its shape and becomes inactivated. [1:10]
An interactive virtual lab that allows students to isolate, copy, sequence and identify bacterial DNA. Excellent supporting information and resources for teachers and students.
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.
See James Watson reenact his discovery of the base pairs that form the double helix structure of the DNA molecule. [1:42]
Discovery how chemical reactions can fuel scientific discovery. [5:55]
Through video clips, demonstrations, and inquiry learn how the wing morph functions in the process of evolution. [0:29]
The zebrafish heart is similar to the human heart in many respects. But unlike the human heart, the fish heart closes wounds rapidly and then regenerates to nearly full function. Fibroblast growth factor (FGF) is an important molecule in the regeneration process. Watch this amazing process in this video. [2.30]
A brief introduction to the four building blocks of DNA. [0:25]
Find out about genetic engineering, and how scientists have found a way to insert new genes into bacterial DNA. [1:12]
This narrated animation allows the learner to understand how six feet of DNA can be tightly packed to fit inside the nucleus of every human cell. [1:43]
A concise overview of what happens when a mutation occurs in our DNA, and how that causes some cancers. [1:06]
Human chromosomes explained in this brief description of human cell biology. [0:47]
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]