Cellular Respiration & Photosynthesis Webquest!
Link 1: http://www.phschool.com/science/biology_place/biocoach/cellresp/intro.html
Navigate your way through this site by using the menu in the LEFT HAND SIDE OF THE SCREEN.
Introduction Page:
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 phosphate bond
(which is the bond on the end of the tail) is _______________.
6. Breaking off the last phosphate group of an ATP produces ___________________________.
7. In this process a phosphate group is detached to yield inorganic phosphate and __________.
Close out this window. From the original window, click “Concept 2: Glycolysis”.
8. Glucose has how many carbons?
9. In glycolysis, glucose is broken down into two molecules of a 3-carbon molecule called ____________
10. This change in glucose is accompanied by a net gain of ______________________ and
_________________.
a. REMEMBER: NADH is like an ATP! It’s stores chemical energy!
Quick Review!
11. What is the first step of cell respiration?
12. What is the second step?
13. What is the third step called?
Click on “Concept 6: Glucose & Energy”
14. The chemical energy stored in glucose generates far more ATP in ________________ than in
respiration without oxygen (________________ and _______________).
15. During aerobic respiration, or respiration with oxygen, each glucose can make how many ATP’s?
16. During anaerobic respiration, which is glycolysis plus fermentation, each glucose can make how many
ATP’s?
17. 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.
18. Aerobic respiration occurs in the presence of _____________.
19. Aerobic respiration releases a lot of __________. (To advance through the screens, click on the silver
arrows at right. You can pause using the pause button between the arrows.)
20. Aerobic respiration can be compared to ______________ because both reactions require ________,
and both use ________ and release _________________. The main difference between the two
reactions is ___________ at which they release energy.
Close the window and go back to the window which has the website above. Click on “View topic” for
Anaerobic Respiration.
21. Your muscle cells change from aerobic to anaerobic respiration if you are running a race because your
heart and lungs can’t supply _______________________________.
22. Click on “Anaerobic Respiration, part 2” in the right side menu. Anaerobic respiration is respiration
without ______________. Why does anaerobic respiration produce less energy than aerobic
respiration?______________________________________________________
________________________________________________________________________
23. All the reactions that occur in anaerobic respiration are controlled by _____________.
Close the window and go back to the window with the website above. Click on “View topic” under the
heading of Fermentation.
24. In yeast, ___________ is converted to alcohol and carbon dioxide in a process called fermentation. If
the temperature is too ______, the yeast won’t grow. If the temperature is too ____ the _________
in the yeast are destroyed.
25. Now, click on “Other uses of fermentation” in the menu at right. We also
use____________________ in making __________.
26. What gets trapped in the dough, making the bread rise? __________________.
27. When we eat bread, the yeast in it is dead. How is the yeast killed?
_______________________________________________________.
28. 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”
29. Photosynthesis converts ______________________ into the __________________ of sugars and
other organic compounds.
30. What is required for photosynthesis to occur (reactants)?
31. List one produce of photosynthesis besides sugars._______________________
Click on “Concept 6: Chloroplast Structure”
32. Where does photosynthesis takes place?
33. How many membranes does a chloroplast have?
34. Label the chloroplast on this page. Write your answers from the top to the bottom.
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.
Light Color
Red
Number of Bubbles
1. Based on the data, what color of light results in the
(Light = 6.0 | CO2 = 6.0) fastest rate of photosynthesis?
___________________
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.
Light Level
1.0
2.0
3.0
4.0
5.0
6.0
7.0
8.0
9.0
10.0
Number of Bubbles
(Light = Colorless | CO2 = 6.0 )
2. Based on the data, what light
level results in the fastest rate of
photosynthesis?
___________________________
3. Why is this light level the best?
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?
8. What settings can you put the simulator on to get the MAXIMUM rate of photosynthesis? (Include all
three variables)