Unit 11 – Cell Energetics Exam – Bio-Hrs
I. “Why do we (animals) need oxygen?” Questions
1. What thing does a cell need to go through aerobic respiration?
a. carbon dioxide
b. light
c. leaves
d. oxygen
2. How many ATP’s can a cell get from 1 glucose if there is NO oxygen?
a. 2 ATP
b. 4 ATP
c. 32 ATP
d. 36 ATP
3. In the electron transport chain of cell respiration, what is oxygen used to make?
a. carbon dioxide
b. electrons
c. energy carriers
d. water
II. “Why do plants need CO2?” Questions
4. What do plants use carbon dioxide for?
a. carbon
b. oxygen
c. energy
d. make water
5. Which part of the plant absorbs CO2?
a. Leaf
b. Root
c. Stem
d. Mitochondrion
III. “What do living things do with the food we eat?” Questions
6. Which cell part breaks down sugar for energy?
a. chloroplast
b. mitochondrion
c. nucleus
d. cytoplasm
7. What do we call the process where living things get energy from food?
a. cellular respiration
b. digestion
c. photosynthesis
d. predation
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8. What is the name of the cycle where cells break down glucose?
a. Cellular respiration
b. Dark reactions
c. digestion
d. Krebs cycle
9. What waste product is produced by cells when they break down glucose?
a. CO2
b. H2O
c. O2
d. ATP
10. What kinds of energy products are made when cells break down glucose?
a. ATP, NADH, FADH2
b. CO2, H2O, ATP
c. O2, H2O
d. ATP, NADPH
11. Where does ATP synthase get the energy needed to make ATP?
a. ADP
b. P
c. ATP
d. H+
IV. “Why do plants need light?” Questions
12. What part of the plant actually absorbs light?
a. chloroplast
b. cytoplasm
c. nucleus
d. plastid
13. Where in the cell is chlorophyll located?
a. chloroplast
b. cytoplasm
c. nucleus
d. plastid
14. What is released by chlorophyll when light strikes a leaf?
a. Carbon dioxide
b. Electrons
c. Heat
d. Water
15. What do plants make with the energy from light?
a. air
b. CO2
c. sugar
d. water
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16. Where do the light reactions occur?
a. cytoplasm
b. cell membrane
c. mitochondrion
d. stroma
e. thylakoid
17. What substance acts as an electron donor to PS2?
a. Carbon dioxide
b. oxygen
c. Water
d. Sugar
V. “How do plants make their own food?” Questions
18. What is the name of the cycle/process where plants make food?
a. Calvin cycle
b. Cellular respiration
c. Krebs cycle
d. Light reactions
19. Where do these reactions take place?
a. Cytoplasm
b. Mitochondrion
c. Stroma
d. Thylakoid membrane
20. What form does the energy to make food come from?
a. ADP
b. ATP, NADPH
c. CO2
d. H2O
21. Where do plants get this energy to make food?
a. Calvin Cycle
b. Carbon dioxide
c. light reactions
d. oxygen
e. Water
22. What is the name of the type of food that most plants make?
a. ATP
b. Fructose
c. Glucose
d. Starch
23. What are the products of photosynthesis?
a. glucose and CO2
b. water and CO2
c. glucose and O2
d. pyruvate and water
e. ATP and NADPH
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24. Which statement BEST sums up the light reaction?
a. glucose is broken down and oxygen is released
b. ATP and NADPH are made, releasing oxygen
c. NADH and FADH2 are made, releasing CO2
d. CO2 combines with sugar to make glucose
VI. “Why do your legs cramp when you exercise?” Questions
25. What is the name of the waste product made by animals when they break down sugar without O2 present?
a. Lactic acid
b. CO2 + alcohol
c. Sweat
d. Water
26. Which process actually fails to occur when O2 is not present?
a. glycolysis
b. krebs cycle
c. electron transport chain
d. photosynthesis
27. What is the name of the waste products made by yeast cells when they break down sugar without O2
present?
a. Lactic acid
b. CO2 + alcohol
c. Sweat
d. Water
28. What do we call the breakdown of sugar without O2 present?
a. Aerobic respiration
b. Anaerobic respiration
c. Cellular respiration
d. photosynthesis
29. Why do your legs feel tired when you do sprints in gym class?
a. You get less energy out of each glucose and run out of food
b. Too much CO2 builds up in your muscles
c. Your muscles overheat
d. You didn’t stretch properly
VII. “How does each part of a plant help it to make food?” Questions
30. Which part of the plant absorbs light?
a. leaf
b. root
c. stem
d. all of these
31. Why do leaves appear green?
a. green light is absorbed
b. green light is reflected
c. all the other colors are reflected
d. green light works best for photosynthesis
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32. Which part of the plant absorbs nutrients and water?
a. Leaf
b. Root
c. Stem
d. All of these
VIII. “Why do plants need fertilizer?” Questions
33. Where can plants get the elements (Phosphorus) they need for Photosynthesis?
a. Soil
b. Air
c. Water
d. Oxygen
IX. “What would happen if the sun went “dark”?” Questions
34. T/F: There can be no photosynthesis at night because the sun is not visible.
35. T/F: No cellular respiration occurs at night because the sun is not visible.
X. Comparison Questions
Match the questions on the left with the process on the right. You can use a choice more than once or not
at all.
36. Makes glucose
a. photosynthesis only
b. cell respiration only
37. Uses CO2
c. both
d. neither
38. Makes ATP for the cell to use
39. Produces O2
40. Converts energy from one form to another
41. Produces water
42. Which living thing uses mitochondria to produce energy?
a. plants
b. animals
c. yeast
d. both a and b
e. a, b, and c are correct
43. T/F: Humans could survive without plants
44. T/F: Plants could survive without humans
45. Both photosynthesis and cell respiration use cycles. Which of the following describes a similarity between
the two cycles used in each?
a. Generate CO2
b. Generate glucose
c. Regenerate starting materials
d. Produce ATP
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XI. Diagram Analysis Questions
Use the pictures to answer the questions.
46. Which part above represents NADPH?
47. Where will the NADPH be used?
a. light reactions
b. dark reactions
c. Krebs cycle
d. Electron Transport Chain
48. Which part above represents chlorophyll?
49. Which part above represents the electron?
50. Which part above represents light energy?
51. What does “A” represent?
a. getting rid of O2
b. getting rid of CO2
c. getting rid of water
d. energy loss
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52. What does “B” represent?
a. water
b. oxygen
c. energy
d. waste products
53. What is the purpose of the picture above in the cell?
a. make sugar
b. break down sugar
54. Where will the products of this picture immediately go?
a. Electron pump to make ATP (energy)
b. Light reactions
c. Used to split sugar
55. Which letter represents O2?
56. Which letter represents NADH, FADH2?
57. Which letter represents H+, e-?
58. Which letter represents water?
59. Where does “A” come from?
a. dark reactions
b. glycolysis
c. Krebs cycle (Mr. Kreb’s Boat)
d. light reactions
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60. Where does O2 come from?
a. photosynthesis
b. cell respiration
c. sugar
d. ATP
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Name ____________________________________
Biology Honors - WRITTEN SECTION:
There is no denying that cellular respiration and photosynthesis are two processes that are linked to one another.
Some might say that photosynthesis and cellular respiration are a lot like a rollercoaster ride, with
photosynthesis being the uphill trip and cellular respiration being like coasting downhill. Defend this analogy
below. Describe which components from each process are like the components of the analogy.
61. What three things provide the energy for the uphill ride?
a.
b.
c.
62. People often celebrate when they get to the top of the hill. Why should a plant cell celebrate reaching the top
of the rollercoaster? (What is made?)
63. Things are often lost from rollercoaster cars as they go over the peak. Name three things that are lost from
the car on the down-hill. (“Lunch” is not an acceptable answer). 
a.
b.
c.
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