Unit 7 Test Review Sheet
Name ____________________________________
1. Organisms use the energy molecule ___ATP____ to carry out life processes.
2. What is the balanced equation for aerobic cellular respiration? Be sure to label reactants and products.
C6H12O6 + 6 O2 → 6 CO2 + 6 H2O + 36 ATP (Energy)
3. Is ATP a reactant or product for aerobic cellular respiration? ______It is a PRODUCT_________
4. Compare and Contrast aerobic respiration with anaerobic respiration in the Venn diagram below. Items
to include would be oxygen requirements, ATP production, where the process occurs in cells, energy
efficiency, any food products made, which organisms utilize the process, and reactants and products.
5. Fill in the Venn diagram below with the two types of anaerobic respiration. Remember: you should put
all of the things they share in the middle section.
6. Which process produces more ATP (anaerobic or aerobic)? ________AEROBIC_________
7. What is the source of energy for photosynthesis? __Sunlight__(Light Energy)________________
8. What is the source of energy for cellular respiration? ____Sugar__(Chemical Energy)_________
9. How is the energy released from molecules like ATP? _______Breaking bonds__________
10. Which kingdoms undergo cellular respiration?
All kingdoms of life
11. Which organisms can undergo photosynthesis?
Bacteria, some protists, and all plants
12. Which organelle in cells is responsible for carrying out aerobic respiration? ____Mitochondria______
13. Which organelle in cells is responsible for carrying out photosynthesis? _____Chloroplasts_________
14. Where does anaerobic respiration take place in the cell? ____Cytoplasm____________
15. Does cellular respiration occur in plants? Yes or No______Yes_____________
16. Which type of cellular respiration is more efficient, aerobic or anaerobic? ______Aerobic_______
17. How is cellular respiration related to photosynthesis? In other words, how do photosynthesis and
respiration work together?
Cellular Respiration uses the products of photosynthesis and gives the
reactants for photosynthesis as waste. Basically, photosynthesis makes
what respiration needs and respiration makes what photosynthesis
needs.
Cellular respiration produces oxygen, while photosynthesis uses
oxygen. Photosynthesis stores energy in sugar, while cellular
respiration releases energy from sugar. Photosynthesis used carbon
dioxide, while cellular respiration produces carbon dioxide.
18. Where can the energy for respiration AND photosynthesis be traced back to?
The sun
19. Describe what happens to your respiration (both external and cellular) when you run long distance
versus when you sprint.
When you run long distance your external respirations inhales enough oxygen to continually
supply cellular respiration. Thus you can continue to run for long periods of time while
undergoing aerobic respiration (The more energy efficient process).
When you sprint, your cells need energy so fast that your external respiration can’t supply enough
oxygen to keep doing aerobic respiration in your cells. Our cells must switch to anaerobic
respiration and we can only sprint for a short period of time (The less efficient process).
20. Where does the exchange of CO2 and O2 occur during external respiration? _Alveoli & Capillaries__
21. Describe how cell respiration and external respiration are different.
Cellular respiration performs the reactions which break sugar down into ATP, while external
respiration is the process by which our respiratory system supplies the reactant oxygen to the cells
in our body to use during cellular respiration.
22. List the structures/organs in order (starting with the mouth/nose) in which oxygen travels throughout the
body. You should end with cells.
Mouth/Nose → Pharynx → Trachea → Bronchi → bronchioles → alveoli → capillaries → blood → cells
For the following questions, please consider what happens to the human body during exercise.
23. What happens to the rate of cellular respiration when you exercise? ____Increase_________________
24. What happens to the rate of external respiration when you exercise? ____Increase_________________
25. What does this mean about the amount of glucose you are using? The amount of glucose would
decrease. If your muscles run out of glucose, lactic acid builds up in the muscle tissue.
26. How does exercise affect your heart rate? ____Increase______________________________
27. How does exercise affect your amount of CO2 being produced? _Exhale; increase producing more CO2_
28. How would your breathing be affected if you were hiking in the Colorado Mountains where the oxygen
levels were lower?
Your breathing would become more difficult because the amount of oxygen getting to the cells is
decreased. You also would not be able to go through as much aerobic cellular respiration.
Graphing Activity: graph the following data taken from a cell respiration experiment – be sure to label axes.
Time
(sec)
Bubbles
produced
at 50o C
0
Bubbles
produced
at 10o C
0
10
5
1
20
12
1
30
23
1
40
34
2
50
35
2
60
35
2
70
35
2
0
29. What is the independent variable in the graph/table above? Temperature (changed from 10oC to 50oC)
30. What is the dependent variable in the graph/table above? __Bubbles produced____________________
31. Describe what happens to the rate of cell respiration in the colder water?
It decreases and is almost not functioning.
32. Describe what happens to the rate of cell respiration in the warmer water?
It increases for 50 seconds and then levels off.
33. What gas is being produced in the bubbles? __Carbon Dioxide_____________________________
34. Conclusion: How could you increase the rate of cellular respiration?
By increasing the temperature or increasing the reactants present (C6H12O6 and O2)
For the following questions, please refer to the graph to the right.
35. What is the independent variable in the experiment to the right?
The concentration of sugar
36. What is the dependent variable in the experiment to the right?
ATP production
37. What conclusion might be drawn from the graph?
As the concentration of sugar increases the amount of ATP
increases in the muscle cells; probably due to an increase in
cellular respiration
Identifying: For each of the following statements, please place “P” if it describes photosynthesis, “CR” if the
statement indicates cellular respiration, or “B” if both processes fit the description.
38. ___P____ Occurs in the chloroplast of the cell
39. ___B____ Occurs in plant cells
40. ___P____ Converts light energy to chemical energy
41. ___CR____ Energy is produced from carbohydrates. Initial source of energy is food.
42. ___CR____ Converts stored chemical energy into ATP
43. ___P____ Will not occur if light is not present
44. ___CR____ Occurs in the mitochondria of the cell
45. ___CR____ Occurs in animal cells
46. ____B___ Initial source of energy is the sun
47. ___CR___ Can occur at all times (light and dark)
Photosynthesis vs. Cellular Respiration
48. What are the reactants for photosynthesis? 6CO2 + 6 H20 + sun
49. What are the products for photosynthesis? C6H12O6 + 6O2
50. What are the reactants for cellular respiration? C6H12O6 + 6O2
51. What are the products for cellular respiration? 6CO2 + 6 H20 + ATP
52. What are the major reasons why our muscles get fatigued/tired after strenuous exercise such as during
weight-lifting?
There is a lack of oxygen during anaerobic respiration and lactic acid builds up. Our muscles do
not get the oxygen they need to do aerobic respiration (energy efficient) and are thus forced to go
through anaerobic respiration (lactic acid fermentation) which is energy inefficient (only 2 ATPs
per glucose).
Photosynthesis and Cellular Respiration
Draw a picture that shows how the two equations (photosynthesis and cellular respiration) are part of a cycle.
Include and label the products and the reactants of each process and draw arrows to show the movement of each
molecule. Finally, include any organisms that utilize each process to help illustrate your points.
The products of one reaction become the reactants of the
other reaction. These two processes are interconnected and
one cannot take place without the other.