Cellular Respiration Project
Objective Given access to the CPH wireless network and a background in the use of laptop computers, students will be able to access a Hotlist of Web sites. From this access students will review the details of glycolysis, the Krebs cycle, and the electron transport system through diagrams and animations. At the conclusion of this review, students will be able to account for all of the products of this metabolic process, answer critical thinking questions, and produce a detailed summary of cellular respiration.
Standards Cell Biology 2.3 - Identify and describe the structure and function of enzymes (CS 1b)
Cell Anatomy 3.0 - Describe how cell organelles function to provide energy, store information, produce proteins, and regulate diffusion
Cell Energetics 4.2 - Describe the role of the mitochondrion in releasing stored energy by completing the breakdown of glucose to carbon dioxide and water in glycolysis, the Krebs cycle, and the electron transport system. (CS 1g)
Cell Energetics 4.3 - Compare and contrast how chemiosmotic gradients in mitochondrion and chloroplasts facilitate the production of ATP. (CS 1i*)
Ecology 9.1 - Explain how water, carbon, and nitrogen cycle between abiotic resources and organic matter in the ecosystem and how oxygen cycles via photosynthesis and respiration. (CS 6d)
Task You are going to review a set of web sites concerning the details of cellular respiration. Each site will discuss either glycolysis, the Krebs cycle, or the electron transport system and you will have the opportunity to watch the animations as many times as you need. After your group has reviewed all of the sites, complete the review questions and create a detailed summary of the entire process of cellular respiration. Be sure to include labeled diagrams to support the statements of your summary.
Questions Answer each of the questions below on a separate piece of paper using complete sentences. Please write only on the front of your piece of paper, use as much scientific vocabulary as possible, and support each of your statements. For a print version of these questions, click here.
1. Using the following links, examine the process of glycolysis:
                       link #1                             
                       link #2
2.   Now that you have reviewed the first step of cellular respiration, or glycolysis,
      determine the products of glycolysis.
3.   Differentiate between the total products  and the net products of glycolysis.
4.   Why is there a discrepancy in the number of ATP molecules formed during glycolysis?
5.   Using the following links, examine the process of glycolysis:
                       link #3                             
                       link #4
                       link #5
6.   Now that you have reviewed the second step of cellular respiration, the Krebs cycle,
      determine the products of Krebs. (Include the link reaction in your calculations.)
7.   Differentiate between the total products of Krebs per pyruvate molecule versus the
      products of Krebs per glucose molecule.
8.   Discuss the mathematical relationship between the product totals from question #7 of
      pyruvate and glucose. What is the molecular cause of this relationship?
9.   Using the following links, examine the electron transport systems:
                       link #6                             
                       link #7
                       link #8                             
                       link #9     (open this as a new window)
10. Now that you have reviewed the third step of cellular respiration, the electron transport
      system (ELS), distinguish between the proteins of the electron transport chain and the
      electron transport system.
11. Outline the function of the ELS.
12. Cyanide gas bonds to the proteins within the ELS, denatures the proteins, and
      prevents these proteins from pumping proteins. Based on this information and your
      knowledge of the ELS, hypothesize as to why cyanide gas is lethal.
13. Examine the credibility of your web sources. What characteristics or features make
      your sources reliable?
14. Discuss the differences between the total number or ATP molecules produced by
      cellular respiration and why these differences exist.
Last Updated 11/16/03
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