Khan Academy
Khan Academy: Cell Cycle Checkpoints
Learn how cells use checkpoints to regulate the cell cycle. This article provides an overview of cell cycle control, outlining the factors that influence a cell's decision to pause or progress at each checkpoint.
Howard Hughes Medical Institute
Hhmi: Biointeractive: The Eukaryotic Cell Cycle and Cancer
Cell division is the only way single-celled organisms can reproduce. Learn more about cell division and explore the phases, checkpoints, and protein regulators of the cell cycle in this interactive. Find out how mutated versions of these...
OpenStax
Open Stax: Cell Growth and Division
The following site provides information regarding the process of cell growth and division.
CK-12 Foundation
Ck 12: Life Science: 2.20 Cell Cycle
Understand the life cycle of a eukaryotic cell.
City University of New York
Brooklyn College: The Cell Cycle: Naming the Parts
Use this information to help you understand the differences between major parts of the cell cycle. A good place to start a study of cell division.
PBS
Nova Online: How Cells Divide, Mitosis vs. Meiosis
Slideshow of mitosis and meiosis side-by-side. It is a summation of the two processes and the differences between them are clear.
University of Arizona
University of Arizona: Cell Cycle and Mitosis Tutorial
Has explanations, illustrations, and a Quick Time movie to download. Also contains practice test questions that are answered online.
University of Arizona
U of a Biology Project: Cell Cycle and Mitosis Tutorial
Poses and answers the question, "What is (and is not) mitosis?" An overview with images of the phases of mitosis, plus a mitosis animation.
Khan Academy
Khan Academy: Apoptosis
Learn about programmed cell death and how it is different from necrosis, cell death due to injury.
San Diego State University
Sdsu: Lesson 2.5: How Do Organisms Reproduce? Meiosis
This site will allow students to grasp the complex concept of meiosis by modeling the process with clay.
Khan Academy
Khan Academy: Test Prep: Mcat: Oxidative Phosphorylation: The Major Energy Provider of the Cell
Explains oxidative phosphorylation, which is the fourth step of cellular respiration, and produces the most of the energy in cellular respiration.
City University of New York
The World of Cells: Viruses
Alive or not, viruses are introduced in an easy to follow essay that explains many basic concepts.
Vision Learning
Visionlearning: Energy in Living Systems: Generation of Atp
Explanation of biochemical processes in cells during metabolism. Focus is on the generation of ATP.
PBS
Pbs Learning Media: Duck Development
This video segment from NOVA: "The Shape of Things" follows the growth of a duck embryo, from a single fertilized egg cell to a complex, hatching duckling. [2:43]
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.
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.
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.
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.
Khan Academy
Khan Academy: Regulation of Cellular Respiration
This article investigates how cellular respiration can be sped up or slowed down in response to ATP levels and other metabolic signals.
BiologyWise
Biology Wise: Photosynthesis and Cellular Respiration
Explains the processes of photosynthesis and cellular respiration in plants. Discusses light-dependent and light-independent reactions in photosynthesis, and glycolysis and aerobic respiration in cellular respiration. The differences...
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