Scientific Articles to Read

Chapter 4

"Revealing the Mystery of the Bacterial Flagellum", an interview with Keiichi Namba.

Assembly of the Bacterial Flagellum, a movie by Keiichi Namba.
This is a large movie file so it may take some time to load with a slow internet connection. Please be patient.


Chapter 27

"Sea Otters: Their Role in Structuring Nearshore Communities", an article identifying sea otters as a keystone species in Western U.S. coastal ecosystems.


Chapter 6

"Bacteria Talk", a movie profile of Bonnie Bassler from NOVA ScienceNow, January 2007, with a discussion of quorum sensing.
(This is a large file. It will take some time to load. If the movie does not load, follow the ScienceNow link to the original file.)

Bacteria Talk, an entertaining interview with Bonnie Bassler, the first to recognize quorum sensing in bacteria, with links to the full length movie profile of Dr. Bassler.
(This is optional but very useful.)

What is Quorum Sensing? A short explanation of quorum sensing from the University of Nottingham Quorum Sensing Research Group.
(You should know the first page of this article.)

Quorum Sensing in Bacteria: We Two are One. A more in depth discussion of quorum sensing, including the history of its discovery and the current status on research.
(This includes more information than you need to know.)


Chapters 7 and 8

ATP Synthesis using a Hydrogen Ion/Proton gradient.
Note: This movie may be large so please give some time for it to load.

The following flash animations may help explain how electrons flow through a membrane in order to generate energy through Photosynthesis and Respiration. These contain extra information that you do not need to know to the exam and are a little dry, but help give a visual representation of what is going on.

Photosynthesis, explained in a flash movie.
Photosystem II, a closer look at the photo-capturing machinery, explained in a flash movie.
The Electron Transport Chain, explained in a flash movie.
All movies are from the Virtual Cell Animation Collection.


Chapter 11

The following four short movies are an artist's depiction of the cellular machinery during DNA Replication.

DNA Replication, from above.

DNA Replication, from the back left.

DNA Replication, from the back right.

DNA Replication, from the front.


Chapter 11

"Molecular Structure of Nucleic Acids", the first article by James Watson and Francis Crick describing the shape of DNA.

"Genetic Implications of the Structure of Deoxyribonucleic Acid", a followup article by Watson and Crick describing base pairing, the sugar-phosphate backbone, and the first thoughts on DNA as a genetic instrument.


Chapter 12

Here are two movies showing the process of transcription and translation.

Transcription, transcribing DNA into RNA.

Translation, translating RNA into amino acids to make proteins.


Chapter 9

Metaphase to Anaphase transition during Mitosis.


Chapter 9

Here are two movies showing meiosis I and II.

Meiosis I, the first round of meiosis.

Meiosis II, the second round of meiosis.


Chapter 13

Here are some flash animations that will help illustrate some of the molecular techniques used in Biotechnology.
Topics covered are:

Polymerase Chain Reaction
Gel Electrophoresis
Bacterial Transformation for Cloning
Sequencing of DNA

And here is a movie showing EcoRI Restriction Enzyme cutting and Ligation of a DNA plasmid.


Chapter 36

B cells Fighting an Infection by Clonal Selection.


Final Review

A Final Review Worksheet.

Animation depicting most major processes in the body.
If you can describe every process depicted in this video, you will do well on the final exam.