Penicillin acting on bacteria
Penicillin, as shown in this video, causes the cell walls of bacteria to rupture.
Play Large: MOV / WMV (0.8 MB)
Play Small: MOV / WMV (0.4 MB)
To download the videos, in Internet Explorer right-click the link and select "Save Target As..." In Firefox right-click and select "Save Link As..." In Safari right-click and select "Download Linked File As..."