The document contains 25 multiple choice questions about cellular respiration. It asks about the reactants, products, and pathways involved in respiration, fermentation, and photosynthesis. Key topics covered include that oxygen absorbs electrons at the end of respiration, carbon dioxide is produced during fermentation and rises bread, and the Krebs cycle produces FADH2. Aerobic respiration produces the most ATP, and oxygen is needed to begin respiration.

1. 1. What absorbs electrons at the
end of respiration?
a. Oxygen
b. Carbon Dioxide
c. Water
d. Proteins

2. 1. What absorbs electrons at the
end of respiration?
a. Oxygen
b. Carbon Dioxide
c. Water
d. Proteins

3. 2. What product of al.
fermentation is used make
dough rise?
a. Ethanol
b. Carbon Dioxide
c. Water
d. Glucose

4. 2. What product of al.
fermentation is used make
dough rise?
a. Ethanol
b. Carbon Dioxide
c. Water
d. Glucose

5. 3. Which of these is a product of
the Krebs cycle?
a. Glucose
b. Pyruvate
c. FADH2
d. Lactic Acid

6. 3. Which of these is a product of
the Krebs cycle?
a. Glucose
b. Pyruvate
c. FADH2
d. Lactic Acid

7. 4. Which can undergo alcoholic
fermentation?
a. Jellyfish
b. Eel
c. Fungi
d. Human

8. 4. Which can undergo alcoholic
fermentation?
a. Jellyfish
b. Eel
c. Fungi
d. Human

9. 5. Buildup of what molecule
causes muscle fatigue?
a. Ethanol
b. Carbon Dioxide
c. Lactic Acid
d. Glucose

10. 5. Buildup of what molecule
causes muscle fatigue?
a. Ethanol
b. Carbon Dioxide
c. Lactic Acid
d. Glucose

11. 6. What process produces the
most ATP?
a. Aerobic Respiration
b. Glycolysis
c. Alcoholic Fermentation
d. Lactic Acid Fermentation

12. 6. What process produces the
most ATP?
a. Aerobic Respiration
b. Glycolysis
c. Alcoholic Fermentation
d. Lactic Acid Fermentation

13. 7. What kind of organisms can
undergo respiration?
a. Heterotrophs and Autotrophs
b. Just Autotrophs
c. Just Heterotrophs
d. Neither Autotrophs nor Heterotrophs

14. 7. What kind of organisms can
undergo respiration?
a. Heterotrophs and Autotrophs
b. Just Autotrophs
c. Just Heterotrophs
d. Neither Autotrophs nor Heterotrophs

15. 8. Which of these is needed to
begin respiration?
a. Water
b. Carbon Dioxide
c. Oxygen
d. Light Energy

16. 8. Which of these is needed to
begin respiration?
a. Water
b. Carbon Dioxide
c. Oxygen
d. Light Energy

17. 9. What molecule is the energy
“currency” of the cell?
a. Carbon Dioxide
b. Pyruvate
c. Glucose
d. ATP

18. 9. What molecule is the energy
“currency” of the cell?
a. Carbon Dioxide
b. Pyruvate
c. Glucose
d. ATP

19. 10. What process do you
undergo during heavy
exercise?
a. Lactic acid fermentation
b. Photosynthesis
c. Alcoholic fermentation
d. Krebs cycle

20. 10. What process do you
undergo during heavy
exercise?
a. Lactic acid fermentation
b. Photosynthesis
c. Alcoholic fermentation
d. Krebs cycle

21. 11. Glucose is broken down
during respiration. Glucose is
a
a. Lipid
b. Carbohydrate
c. Nucleic acid
d. Protein

22. 11. Glucose is broken down
during respiration. Glucose is
a
a. Lipid
b. Carbohydrate
c. Nucleic acid
d. Protein

23. 12. How do heterotrophs obtain
glucose for respiration?
a. Eat plants
b. Create it within cells using light
c. Change other sugars
d. Make it from ATP

24. 12. How do heterotrophs obtain
glucose for respiration?
a. Eat plants
b. Create it within cells using light
c. Change other sugars
d. Make it from ATP

25. 13. Glycolysis takes place mainly
in the
a. Chloroplast
b. Cytoplasm
c. Ribosome
d. Mitochondria

26. 13. Glycolysis takes place mainly
in the
a. Chloroplast
b. Cytoplasm
c. Ribosome
d. Mitochondria

27. 14. Which of these is NOT
needed for photosynthesis?
a. Chlorophyll
b. Light Energy
c. Carbon Dioxide
d. Oxygen

28. 14. Which of these is NOT
needed for photosynthesis?
a. Chlorophyll
b. Light Energy
c. Carbon Dioxide
d. Oxygen

29. 15. Alcoholic fermentation
produces how many
molecules of ATP?
a. 38
b. 34
c. 2
d. 0

30. 15. Alcoholic fermentation
produces how many
molecules of ATP?
a. 38
b. 34
c. 2
d. 0

31. 16. The goal of respiration is to
produce
a. Glucose
b. Proteins
c. ATP
d. Carbon Dioxide

32. 16. The goal of respiration is to
produce
a. Glucose
b. Proteins
c. ATP
d. Carbon Dioxide

33. 17. In what form is carbon
released from a cell during the
Krebs cycle?
a. Glucose
b. Carbon dioxide
c. Carbohydrates
d. Water

34. 17. In what form is carbon
released from a cell during the
Krebs cycle?
a. Glucose
b. Carbon dioxide
c. Carbohydrates
d. Water

35. 18. What controls whether a cell
will undergo fermentation or
not?
a. Water Concentration
b. Carbon Dioxide Concentration
c. Size of the Cell
d. Oxygen Concentration

36. 18. What controls whether a cell
will undergo fermentation or
not?
a. Water Concentration
b. Carbon Dioxide Concentration
c. Size of the Cell
d. Oxygen Concentration

37. 19. Which of these pairs are the
REACTANTS of respiration?
a. Oxygen and carbon dioxide
b. Water and glucose
c. Oxygen and glucose
d. Water and oxygen

38. 19. Which of these pairs are the
REACTANTS of respiration?
a. Oxygen and carbon dioxide
b. Water and glucose
c. Oxygen and glucose
d. Water and oxygen

39. 20. Sugars can be created using
energy from light by
a. Heterotrophs and Autotrophs
b. Just Autotrophs
c. Just Heterotrophs
d. Neither Autotrophs nor Heterotrophs

40. 20. Sugars can be created using
energy from light by
a. Heterotrophs and Autotrophs
b. Just Autotrophs
c. Just Heterotrophs
d. Neither Autotrophs nor Heterotrophs

41. 21. The 3-carbon molecule
produced during glycolysis is
a. Glucose
b. Pyruvate
c. Ethanol
d. Lactic Acid

42. 21. The 3-carbon molecule
produced during glycolysis is
a. Glucose
b. Pyruvate
c. Ethanol
d. Lactic Acid

43. 22. The mitochondria play their
most important role in
a. Osmosis
b. Photosynthesis
c. Respiration
d. Reproduction

44. 22. The mitochondria play their
most important role in
a. Osmosis
b. Photosynthesis
c. Respiration
d. Reproduction

45. 23. Which of these pairs are the
PRODUCTS of respiration?
a. Oxygen and carbon dioxide
b. Water and glucose
c. Carbon dioxide and glucose
d. Water and carbon dioxide

46. 23. Which of these pairs are the
PRODUCTS of respiration?
a. Oxygen and carbon dioxide
b. Water and glucose
c. Carbon dioxide and glucose
d. Water and carbon dioxide

47. 24. After glycolysis, a cell with
high oxygen levels will
undergo
a. Lactic Acid Fermentation
b. Alcoholic Fermentation
c. Aerobic Respiration
d. Photosynthesis

48. 24. After glycolysis, a cell with
high oxygen levels will
undergo
a. Lactic Acid Fermentation
b. Alcoholic Fermentation
c. Aerobic Respiration
d. Photosynthesis

49. 25. The maximum number of ATP
that can be created from the
breakdown of two molecules
of glucose is
a. 2
b. 36
c. 38
d. 76

50. 25. The maximum number of ATP
that can be created from the
breakdown of two molecules
of glucose is
a. 2
b. 36
c. 38
d. 76

51. 1. A
2. B
3. C
4. A
5. C
6. A
7. A
8. C
9. D
10. A
11. B
12. A
13. B
14. D
15. D
16. C
17. B
18. D
19. C
20. B
21. B
22. C
23. D
24. C
25. D