Cell and Molecular Biology text online, developed by students at MIT, that covers most of the material in this course:  http://esg-www.mit.edu:8001/esgbio/chapters.html

Chapter 2  The Chemical Basis of Life Web Resources:
The Periodic Table     http://www.shef.ac.uk/~chem/web-elements/biol/periodic-table.html
http://www.webelements.com/  a web periodic table, with information and links to data about the biological significance of each element. Click on an element to explore its properties: 
Properties of Water    http://cwis.nyu.edu/pages/mathmol/modules/water/info_water.html each image is a link allowing you to view enlarged graphics or short movies. 
The Biology Project http://www.arizona.biology.edu   
Chapter 3 The Molecules of Cells Web Resources:
The Biology Project http://www.arizona.biology.edu   (click on biochemistry for overview)
 The Lipid Page    http://www.nyu.edu/pages/mathmol/library/lipids/index.html search image is a link allowing you to view enlarged graphics (click on the gif image). 
Monosaccharide Browser   http://bmbwww.leeds.ac.uk/designs/monosac/home.htm
Web source of information about sugars. Suggested starting point:  D-Glucose http://bmbwww.leeds.ac.uk/designs/monosac/ald_6_2.htm  
Jack Brown’s molecular images    http://www.cc.ukans.edu/~micro/picts.html   : images of proteins and DNA in various representations. 

Chapter 4 A Tour of the Cell Web Resources: 
Cells Alive    http://www.cellsalive.com/    A large collection of light micrographs showing a wide variety of cells and featuring time-lapse photography. Includes many video clips and animations. 
 The Virtual Cell  http://ampere.scale.uivc.edu/~m-lexa/cell/cell.html   Select an action from the list on the right (e.g. cut, view EM), then click on the image of the cell to see the result of your action. This is a good way to explore features of the cell. 
Course Tutorial in Cell Biology   http://lenti.medumn.edu/~mwd/cell_www/cell.html    Detailed on-line course materials for a cell biology course. Look at individual pages on all aspects of cell structure and function. by Mark Dalton.  Or try http://www.cbc.umn.edu/~mwd/cell_www/cell.html
“First Cell”  by Carl Zimmer(from Discover Magazine, Nov. 1995)    http://www.enews.com/magazines/discover/magtxt/110195-7.htm/   The evolution of membranes may have been the critical evolutionary step that made life possible. 
“The Mother of all Blood Cells”  by Peter Radetsky. (from Discover Magazine, March 1995). 
http://www.enews.com/magazines/discover/magtxt/030195-2.html   Stem cells, found in bone marrow, are the source from which all our red cells, white cells, and platelets are constantly produced. Until recently, no one was able to get them to grow and divide outside the body. The rewards and applications of successful stem cell growth in vitro are phenomenal -- read about it here! 

Chapter 5 The Working Cell Web Resources:   Energy, Enzymes & Catalysis Problem Set   http://www.biology.arizona.edu/biochemistry/problem_sets/energy_enzymes_catalysis/energy_enzymes_catalysis.html
from the University of Arizona. 

Chapter 6 How Cells Harvest Chemical Energy Web Resources: 
Introduction to Glycolysis Home Page        http://bmbwww.leeds.ac.uk/designs/glyintro/home.htm   from the University of Leeds, UK. Includes "step by step glycolysis" with animations, and a "do-it-yourself" glycolysis kit. 
Metabolism Problem Set http://www.biology.arizona.edu/biochemistry/problem_sets/metabolism.html
from the University of Arizona. 

Chapter 7 Photosynthesis: Using Light to Make Food
Introduction to spectrum and pigments 
http://www.gened.emc.maricopa.edu/bio/bio181/BIOBK/BioBookPS.html 

Chapter 8 Cellular Basis of Reproduction and Inheritance
The Biology Project http://www.arizona.biology.edu   (click on mitosis & meiosis)
Try some of the quiz questions.
Make a karyotype from a chromosome spread online  
http://www.biology.washington.edu/bsa/karyotypeS.html

Chapter 9 Patterns of Inheritance Web Resources: 
The Biology Project http://www.arizona.biology.edu   (click on genetics)

Virtual Fly Lab  http://vflylab.calstatela.edu/edesktop/VirtApps/VflyLab.html   Do your own Drosophilia crosses on line 
A Classroom Guide to Yeast Experiments    http://www.phys.ksu.edu/gene/chapters.html

Chapter 12 DNA Technology Web Resource
Try the DNA tutorial from the DNA Learning Center at Cold Spring Harbor
http://vector.cshl.org 
Try some bioinformatics with the tutorials from The Whitehead Institute 
http://www.wi.mit/bio/pub/hsteachers.html
  The Human Genome Web Resources:   
Primer on Human Genetics and the Human Genome Project   http://www.gdb.org?Dan?DOE/intro.html   good overview from the Department of Energy. 
 Human Gene Map is posted on the web    http://www.infobeat.com/stories/cgi/story.cgi?id=2556473475-ac2
see what genes have been identified.    DOE Human Genome Project  http://www.er.doe.gov/production/ober/hug_top.html
& http://www.ornl.gov/hgmis  links to many other sites. 
Online Mendelian Inheritance in Man(OMIM)    http://www.ncib.nlm.nih.gov/Omim

Chapter 13 Human Evolution Web Resources:   
Lucy  http://www.geocities.com/CapeCanaveral/Lab/8853/index.html
Evaluate fossil evidence from Lucy     http://www.cen.uiuc.edu/~priestle/aa/ determine how similar she was to hominoids. 

You don’t need a list of every relevant site on the World Wide Web, by following the links on the above sites you can eventually reach every Biology site in the world. If you have unlimited time try the Biological Sciences Resource Index (  http://bio444.beaumont.plattsburgh.edu/Biosciences.html ).