Download PRENTICE HALL ONLINE ACTIVITY 7

PRENTICE HALL ONLINE ACTIVITY 7.5
“Cellular Respiration converts energy in food to energy in ATP”
NAME ____________________________________
See how the three stages of respiration- glycolysis, the Krebs cycle, and the
electron transport chain- generate the energy unit called ATP.
PAGE 1.
1. Starting with the “bear”, trace where energy gets broken down by cellular
respiration:
______bear_____  _________________  _________________  ________________
2. Look at the cell close-up.
a. Where in the cell does “glycolysis” take place? ______________________
b. Where in the cell does the “Krebs Cycle” take place? ______________________
c. Where in the cell does the “ectron transport chain” take place? ______________________
** Click the arrow “Glycolysis” in the cytoplasm of the cell to begin the activity.
3. What is the starting material used for cellular respiration that is entering the cell from the lefthand side? ___________________
4. How many carbon atoms does this molecule have? _____________
5. What are two other kinds of molecules you can find right now in the cytoplasm?
___________________________________________________________________________
6. What is the first stage of cellular respiration called and where does it take place?
___________________________________________________________________________
7. Why do you need to use 2 ATP molecules to start the process of glycolysis?
___________________________________________________________________________
8. What is the energy called that is needed to start a chemical reaction?
__________________________________________
** Put two ATP “coins” in the slot to start the game. Play
the simulation with the sound on if you’d like.
9. What happens to the 6-carbon molecule of glucose when you
perform glycolysis? __________________________________
__________________________________________________
10. What does one glucose molecule become after a complete cycle of glycolysis?
__________________________________________________________________________
11. What does NAD+ become when glycolysis happens? ______________
(Hint: Re-play simulation but this time, watch NAD+ the whole time, see where it ends
up)
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15.
How many of the molecules in Question #11 result from glycolysis? __________________
What process comes after glycolysis? ______________________________
Where does this process occur? ___________________________________
When one pyruvic acid molecule moves into the Krebs Cycle, how many CO2 molecules get
released? ________________
16. What happens to FAD molecules when the Krebs Cycle takes place?
___________________________________________________________________________
17. How many times does the Krebs Cycle occur from just one original molecule of glucose?
___________________
18. For the Krebs Cycle, complete the table:
Molecule
CO2
NADH
FADH2
Total # Produced
19. Go to Electron Transport Chain. What happens to NADH when the ETC begins?
_________________________________________________________________________
20. What gas do you find at the end of this chain? _____________________
21. What product is coming out of the imaginery “faucet”? ________________
22. How many ATP are produced from the Electron Transport Chain? __________________
23. What part of cellular respiration produces CO2? ___________________________
24. What part of cellular respiration produces water? __________________________
25. What gas is the final electron acceptor in the Electron Transport Chain? ________________
26. Give the total energy breakdown:
Stage:
Glycolysis
Krebs Cycle
(aka “Citric Acid Cycle”)
Electron Transport Chain
(aka “Oxidative Phosphorylation”)
Total ATP Produced:
PRENTICE HALL ONLINE ACTIVITY 7.6
“Some Cells Can Harvest Energy without Oxygen”
NAME ____________________________________
Sometimes cells do not have enough oxygen for cellular respiration to make all the ATP they
need. In that case, many cells add a second process called fermentation, to make more ATP.
Play fermentation pinball to see how much ATP fermentation makes.
PAGE 1: Discover how many ATP molecules are made in fermentation.
1. Where does “lactic acid fermentation” take place? __________________________________
** Click the “Lactic Acid Fermentation” arrow to enter the simulation. Locate the
“Oxygen Level” setting at the bottom and switch it all the way to “LOW”.
PAGE 2.
2. What phase of cellular respiration immediately gets closed off?
_________________________________________________
** Begin the simulation by dragging 2 ATP molecules to the slot.
3. What molecule starts off the process? ____________________________________________
4. What process breaks this molecule down into pyruvic acid? ___________________________
5. Once again, what does NAD+ become once glycolysis takes place? _____________________
6. Where is this process of lactic acid fermentation taking place? _________________________
7. What part of this simulation is NOT involved with fermentation? ______________________
8. From the 3 glucose molecules used, how many lactic acid molecules were produced? ______
9. From the 3 glucose molecules used, how much ATP was produced? ____________
How much ATP is produced from EACH glucose molecule that goes through lactic acid
fermentation? __________
10. Is oxygen present in fermentation? __________
11. In lactic acid fermentation, are there any other products besides lactic acid and ATP?
_________________________