This site is loaded with illustrations and animations of types of cells, their life cycle, biology, microbiology, immunology and microscopy.  There’s a gallery of cells and quizes and puzzles for students to solve for different types of cells.  Animated illustrations accompany actual cells, with phases labeled, for mitosis and meiosis.

From site:  Welcome to 123 Biology! This site introduces and gives you all the information you need on Biology. It also gives you tips on how to study, takes notes, and test well. The study of living organisms utilizing the scientific method is called Biology.

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What is life? Does this sound like a strange question to you? Of course we all know what is meant by the word “life”, but how would you define it? Explore the links at the right to learn more about the stuff life is made of, genetics, the diversity of living things, how they coexist in ecosystems and evolve over time.

From site:  There’s little doubt that proteomics — the study of an organism’s complete complement of proteins — will have great impact in all areas of the life sciences in the years to come. And the reason is clear. “To really understand biological processes, we need to understand how proteins function in and around cells since they are the functioning units,” says Hanno Steen, director of the Proteomics Center at Children’s Hospital Boston…

Guide to Sequencing and Identifying Proteins is a step-by-step explanation of how to identify and sequence proteins using 2-D electrophoresis, mass spectroscopy and informatics.

From site:  This interactive feature gives you the chance to manipulate embryonic stem cell growth and differentiation in your own virtual stem cell laboratory. It presents you with a dynamic, self-replicating “culture” of embryonic stem cells. At your disposal is a choice of factors. Do nothing and the cells will continue to replicate, but all of the new cells will also be embryonic stem cells. By selecting a certain sequence of these factors, however, you should be able to create muscle cells, neurons and other cell types, as well as the intermediary cells that lead to the specialized ones.