Molecular Biology of the Cell - 3rd edition, of book by Alberts et al published in 1994, accessible for free from the National Center for Biotechnology Information, Bethesda, MD. - http://www.ncbi.nlm.nih.gov/books/bv.fcgi?call=bv.View..ShowTOC&rid=cell.TOC&depth=2
Biochemistry Texts by Lubert Stryer - Designed to accompany the fourth and fifth editions of the textbook. Offers outline, activities, links, and tutorials. - http://www.whfreeman.com/stryer/
Companion Web Site - Accompanies the third edition of Biochemistry by Mathews, van Holde, and Ahern. Includes chapter by chapter guidelines to supplement the book, with figures, text, and cross-referenced subjects. - http://www.awlonline.com/mathews/