Nuclear Structure and Function Research Group

Cell and molecular biology
http://www.accessexcellence.org/AB/GG/ National Health Museum page of various molecules and cellular structures.
http://www.biology.arizona.edu/default.html Biology project of the University of Arizona, with tutorials and tests.
http://www.healthscience.net/resources/health-sciences-anatomy-learning-center/ Anatomy resource from Healthscience.net
http://vlib.org/Science/Cell_Biology/index.shtml The WWW Virtual Library of Cell Biology.  
http://ocw.mit.edu/OcwWeb/index.htm  Open course ware from MIT.
http://www.cellbio.com/ An informational resource for cell and molecular biologists.
http://www.ucmp.berkeley.edu/history/evolution.html Museum of paleontology at the University of California, Berkeley.
http://www.dnalc.org/home.html Animations of genes from Cold Spring Harbor.
http://www.biostudio.com/a_sitemap.htm Animations of various biological processes from BioStudio.
http://www.bio.davidson.edu/courses/genomics/methodslist.html#meth2 Metalist of experimental techniques from Davidson College.
http://vcell.ndsu.edu/animations/ The basics of transcription and translation from NDSU.
http://www.ucalgary.ca/UofC/eduweb/virtualembryo/ A growing site for all things developmental.
http://www.ahpcc.unm.edu/%7Earoberts/ A meta-list of bioscience sites.
http://www.textbookrevolution.org/ Links to articles/textbooks.

Chemistry and physics
http://webserver.lemoyne.edu/faculty/giunta/papers.html Classic papers in chemistry from Lemoyne.
http://www.psrc-online.org  Tutorials in physics given at different different levels.