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Cellular Respiration & Photosynthesis Webquest! Name: __________________ http://www.phschool.com/science/biology_place/biocoach/cellresp/intro.html Introduction: 1. Cellular respiration is the process by which ______________________________________________. 2. What types of macromolecules can be used as fuels for cell respiration? Click on “Concept 1: Overview of Respiration.” Click on “Review” on the RIGHT HAND SIDE OF SCREEN. Click on “A Closer Look at Energy & ATP” at the bottom of the pop up window. 3. The ATP molecule stores what? 4. The energy in an ATP can be stored at one location, then moved from one part of the cell to another, where it can be released to drive other _________________________. 5. The energy stored in ATP at one location is released from ATP when the terminal, or 3rd, phosphate bond is broken. Breaking off the last phosphate group of an ATP produces ______________________ and phosphate. Close out this window. From the original window, click “Concept 2: Glycolysis”. 6. Glucose has how many carbons? 7. In glycolysis, glucose is broken down into two molecules of a 3-carbon molecule called ____________ 8. This change in glucose is accompanied by a net gain of ______________________ and _________________. a. REMEMBER: NADH is like an ATP! It’s stores chemical energy! Click on “Concept 6: Glucose & Energy” 9. The chemical energy stored in glucose generates far more ATP in ________________ than in respiration without oxygen (________________ and _______________). 10. During aerobic respiration, each glucose can make how many ATP’s? 11. During anaerobic respiration, each glucose can make how many ATP’s? 12. Anaerobic respiration occurs with or without oxygen? Link 2: http://lgfl.skoool.co.uk/keystage4.aspx?id=849 Click on “View topic” under the heading of “Aerobic Respiration” 13. Aerobic respiration occurs in the presence of __________________________________. 14. Write the names of each of the following molecules below each item. C6H12O6 + 6O2 6CO2 + 6H2O + Energy Close the window and go back to the main window. Click on “View topic” for “Anaerobic Respiration” 15. Your muscle cells change from aerobic to anaerobic respiration if you are running a race because your heart and lungs can’t supply _______________________________. 16. Anaerobic respiration is respiration without ______________. 17. During aerobic respiration, glucose is broken down into what three products? 18. During anaerobic respiration, glucose is broken down in what two products? Close the window and go back to the window with the website above. Click on “View topic” under the heading of Fermentation. 19. In yeast, ___________ is converted to alcohol and carbon dioxide in a process called fermentation. 20. Fermentation is useful in making what two products? 21. What gets trapped in the dough, making the bread rise? __________________. 22. Bacteria use fermentation to produce ____________ from _________. The bacteria convert _______________ in milk to ___________________. That is why yogurt has a ________ taste. Link 3: http://www.phschool.com/science/biology_place/biocoach/photosynth/chloroplast.html Click on “Concept 1: An Overview of Photosynthesis” 23. Photosynthesis converts ______________________ into the __________________ of sugars and other organic compounds. 24. Look at the picture. List 2 reactants and 2 products. a. Reactants: b. Products: 25. What drives photosynthesis? Click on “Concept 6: Chloroplast Structure” 26. Where does photosynthesis takes place? 27. How many membranes does a chloroplast have? 28. Label the chloroplast on this page. Write your answers in order from top to the bottom. **Study Guide** You may use the internet, your online textbook, or your notes to answer the following: A. What is the equation for cellular respiration? B. What is the equation for photosynthesis? C. In which organelle does photosynthesis take place? D. In which organelle does cell respiration take places? E. What do pigments do? F. Be able to label a chloroplast stroma, thylakoid, and granum. G. When a phosphate group is release from an ATP, is energy released or absorbed? H. When a phosphate group is added to an ADP, what is formed? Is energy released or absorbed? I. Which process requires oxygen, aerobic or anaerobic? J. During glycolysis, glucose is broken down in what? K. Glycolysis is the first step of ______________________ and ____________________. L. What are the two steps of aerobic respiration? M. List the two types of anaerobic fermentation, waste products for each, and cells that perform each type. N. How many ATP’s per glucose molecule can you get during aerobic cellular respiration? How many can you get from glycolysis + fermentation? EARLY FINISHERS CAN COMPLETE THE BELOW WATERWEED SIMULATION Introduction: In this simulation, you will be looking at the production of carbon dioxide as a plant (the waterweed) photosynthesizes. Carbon dioxide is measured in the number of bubbles produced by the plant. Three factors that influence the rate of photosynthesis can be adjusted in the simulator to determine how each of the factors affects the rate of photosynthesis. Link 4: http://www.saddleworth.oldham.sch.uk/science/simulations/waterweed.htm I. Effect of Light Color on the Rate of Photosynthesis Set the simulator to 6.0 Light Level, and 6.0 CO2 Level. Adjust the colors to complete the table. Number of Bubbles 1. Based on the data, what color of light results in the Light Color (Light = 6.0 | CO2 = 6.0) fastest rate of photosynthesis? ___________________ Red Blue 2. Why do you think this color of light was most effective? ___________________________________ Green ____________________________________________ Colorless (white) ___________________________________________ II. Effect of Light Level on Photosynthesis Set the simulator to colorless light and CO2 level to 6.0. Make adjustments to the level of light to complete the data table. Put your speed at X5 to speed up the process. Number of Bubbles 2. Based on the data, what light Light Level (Light = Colorless | CO2 = 6.0 ) level results in the fastest rate of photosynthesis? 1.0 2.0 ___________________________ 3.0 3. Why is this light level the best? 4.0 5.0 6.0 7.0 8.0 9.0 10.0 III. Effect of CO2 Level on Photosynthesis Develop an experiment to test how the level of CO2 affects the rate of photosynthesis. Construct a data table in the space below that shows the data you collected. Make sure to include information such as the color of light, light intensity, level of CO2 and the amount of bubbles produced. (Use the previous experiments as a guide) Data Table 3. Based on the data, what level of CO2 results in the fastest rate of photosynthesis? _________________ IV. ANALYSIS 4. Based on the simulation experiments, what factors can affect the rate of photosynthesis in a plant? 5. There is one other factor that can affect the rate of photosynthesis besides light levels (intensity), carbon dioxide concentration, and light color? What is this factor? (Hint: it’s on the first page of notes you received on Photosynthesis & Respiration); Hint #2: The factor can make enzymes fall apart and quit working! 5. Write the equation for photosynthesis (use your book or online resources if you don't know it). 6. What are the bubbles you are measuring in this lab? Why do the bubbles tell you how fast photosynthesis is occurring? 7. Why is it important that you keep two variables constant (such as light level and color) while you're testing how a third variable (CO2 Level) affects photosynthesis?
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