OpenStax
Open Stax: Anatomy & Physiology: Erythrocytes
Learn about the anatomy and the various steps in the life cycle of an erythrocyte, and find out about the composition and function of hemoglobin.
PBS
Pbs: Never Say Die: The Clock of Life
This site from the PBS production, Scientific American Frontier "Never Say Die", includes a section entitled "The Clock of Life". It provides a discussion of cell death through shortening of the telomere. A good class activity included.
CK-12 Foundation
Ck 12: Life Science: Dna Structure and Replication
[Free Registration/Login may be required to access all resource tools.] DNA must replicate (copy) itself so that each resulting cell after mitosis and cell division has the same DNA as the parent cell. DNA replication occurs during the S...
Texas Instruments
Texas Instruments: Reproduction (Mitosis and Meiosis)
This activity on Mitosis and Meiosis is designed to assess knowledge and understanding of important cell cycle processes, including mitosis and meiosis.
Ohio State University
Ohio State University: Respiration
Informative text is clearly written and supported by good illustrations and charts as well. A quiz is also provided at the bottom of the site.
TeachEngineering
Teach Engineering: Cellular Respiration and Bioremediation
Students learn about the basics of cellular respiration. They also learn about the application of cellular respiration to engineering and bioremediation. And, they are introduced to the process of bioremediation and examples of how...
Teachers TryScience
Teachers Try Science: Breathing Yeasties
See how combining yeast, sugar, and water can demonstrate the carbon cycle and show how microorganisms work in the food chain.
BiologyWise
Biology Wise: Cellular Respiration Diagram
The equation for cellular respiration is given and a diagram is provided that illustrates the process with glycolysis, the Krebs cycle, and the electron transport chain shown. Each of these steps is explained and a summary of the total...
University of Manitoba
University of Manitoba: Sexual Reproduction and Meiosis
Meiosis tutorial with clickable glossary, diagrams, and photos of cells as they move through the phases. A good site from the University of Manitoba.
CK-12 Foundation
Ck 12: Biology: Reproduction and Meiosis Study Guide
Use this review guide to understand cell-reproduction and meiosis.
Cold Spring Harbor Laboratory
Dna Interactive: Manipulation
Once the code was discovered, how could DNA be manipulated, what tools would be needed to make use of DNA. These are some questions answered in this interactive website.
Biology Pages
Kimball's Biology Pages: Dna Replication
This page provides a fairly high level explanation of DNA replication with extensive graphics. Good description of this process.
McGraw Hill
Glencoe Biology: Mitosis and Cytokinesis: Self Check Quiz
Five self-checking quiz questions to check student understanding of mitosis and cytokinesis.
PBS
Pbs Nova: Guess the Embryo
Every animal starts out as a single, fertilized cell. What happens then? Launch an interactive that showcases four similar-looking embryos. Can you guess what each one of them actually is? Watch them develop.
Other
E Cycle Best: The Metamorphosis: From Rotary Dials to Smartphones
Learn how a rotary phone transformed into the smartphones we have today in this article.
Soft Schools
Soft Schools: Meiosis Quiz
Take an interactive quiz over meiosis. After completing the quiz, check your score, and then revisit any incorrect question for further review
BiologyWise
Biology Wise: Mitochondrial Matrix
Discusses the structure of the matrix inside a mitochondrion and how hundreds of concentrated enzymes are held there. The matrix takes part in mitochondrial functions such as the Krebs cycle, the electron transport chain, ATP synthesis,...
ClassFlow
Class Flow: Cellular Respiration
[Free Registration/Login Required] This is a comprehensive, engaging overview of catabolic pathways that yield energy by oxidizing organic fuel. Students explore redox reactions, oxidation, reduction, and preview the stages of cellular...
BiologyWise
Biology Wise: Cellular Respiration in Plants
Explains what cellular respiration is, its function, and the three stages it goes through when it takes place in a cell.
BiologyWise
Biology Wise: What Is Anaerobic Respiration?
Explains what anaerobic cellular respiration is and how it differs from aerobic respiration. Discusses what this looks like in muscle cells, what the steps are, and the formula for anaerobic respiration.
TeachEngineering
Teach Engineering: Keepers of the Gate
Through two lessons and five activities, students explore the structure and function of cell membranes. Specific transport functions, including active and passive transport, are presented. In the legacy cycle tradition, students are...
Texas A&M University
Peer Curricula: Story Time: Hans Krebs
Read about Hans Krebs' childhood and how it influenced his interest in science. Read about the importance of mentors in his life as he did research in chemistry.
Estrella Mountain Community College
Estrella Mountain: Cellular Metabolism & Fermentation
This online biology book offers a comprehensive overview of cellular metabolism and fermentation. Content includes a look at glycolysis, anaerobic pathways, and aerobic respiration.
University of Hamburg
University of Hamburg: C3, C4, and Cam. Regulation of the Activity of Photosynthesis
Compares and contrasts C3, C4, and CAM photosynthetic pathways. Digram of C4 reaction included.