AP Bio fermentation vs aerobic respiration practice questions
AP Biology practice questions comparing fermentation and aerobic respiration, focusing on processes, equations, and energy yield.
Quiz(48 questions)
1. What is the first stage of aerobic respiration?
Terms in this Study Set(48)
Aerobic Respiration Overview(16)
What are the main stages of aerobic respiration?
Glycolysis, Krebs cycle, and Electron Transport Chain.
Where does glycolysis occur?
In the cytoplasm of the cell.
True or False: Aerobic respiration occurs without oxygen.
False. Aerobic respiration requires oxygen to produce energy.
Fill in the blank: The main product of glycolysis is __________.
Pyruvate.
How many ATP are produced in glycolysis?
A net gain of 2 ATP molecules.
What is the role of the Krebs cycle?
To produce electron carriers (NADH, FADH2) and ATP from acetyl CoA.
Cause → Effect: Oxygen is present.
Cells undergo aerobic respiration, producing more ATP.
What happens to pyruvate in the presence of oxygen?
It is converted into acetyl CoA for the Krebs cycle.
How much ATP is produced in the Krebs cycle per glucose?
2 ATPs, plus 6 NADH and 2 FADH2.
Where does the Electron Transport Chain occur?
In the inner mitochondrial membrane.
What is the final electron acceptor in aerobic respiration?
Oxygen, forming water.
True or False: The total yield of ATP from one glucose molecule is approximately 38.
True. Up to 38 ATP can be produced via aerobic respiration.
How is the majority of ATP produced in aerobic respiration?
Through oxidative phosphorylation during the Electron Transport Chain.
Comparison: Aerobic vs. Anaerobic respiration.
Aerobic produces more ATP (up to 38) vs. Anaerobic (2 ATP).
Calculate the total ATP yield: Glycolysis + Krebs + ETC.
ATP.
What byproducts are produced in aerobic respiration?
Carbon dioxide and water.
Fermentation Methods(16)
What is alcoholic fermentation?
A process where glucose is converted into ethanol and carbon dioxide by yeast. Important in brewing and baking.
Lactic acid fermentation occurs in which organism?
Occurs in muscle cells during strenuous exercise and in certain bacteria. Produces lactic acid and energy.
True or False: Fermentation requires oxygen.
False. Fermentation is an anaerobic process, meaning it occurs without oxygen.
Identify one product of yeast fermentation.
Ethanol - used in alcoholic beverages and biofuel production.
How many ATP are produced in lactic acid fermentation?
2 ATP per glucose molecule, generated through glycolysis.
Fill in the blank: Fermentation regenerates ________ for glycolysis.
NAD+, allowing continued ATP production under anaerobic conditions.
What is the significance of fermentation in food production?
Fermentation imparts unique flavors and preserves food by inhibiting spoilage organisms.
Compare alcoholic fermentation and lactic acid fermentation.
Alcoholic: Produces ethanol and CO2. Lactic acid: Produces lactic acid. Both regenerate NAD+.
What is a primary use of lactic acid fermentation in industry?
Used in yogurt production; bacteria ferment lactose into lactic acid, thickening the product.
Cause → Effect: Glucose is fermented.
Produces energy and byproducts like ethanol or lactic acid, depending on the process.
How does fermentation contribute to energy production?
Allows glycolysis to continue by regenerating NAD+, resulting in limited ATP production.
Define the term 'substrate-level phosphorylation'.
Direct ATP production through the transfer of a phosphate group, occurring in glycolysis and fermentation.
True or False: Fermentation is more efficient than aerobic respiration.
False. Fermentation produces significantly less ATP than aerobic respiration (2 ATP vs. up to 36 ATP).
What is a common example of lactic acid fermentation in humans?
Occurs during intense exercise, leading to muscle fatigue due to lactic acid buildup.
Fill in the blank: Yeast ferments ________ to produce alcohol.
Sugars (like glucose, fructose) during anaerobic conditions.
List two organisms that undergo alcoholic fermentation.
- Yeast - Certain bacteria (like Zymomonas mobilis)
Comparison of Processes(16)
Fermentation occurs in the absence of what?
Oxygen. Fermentation is an anaerobic process.
Aerobic respiration produces more ATP than fermentation. True or False?
True. Aerobic respiration produces about 36-38 ATP, while fermentation yields only 2 ATP.
Fill in the blank: The final electron acceptor in aerobic respiration is _____
Oxygen.
What are the end products of alcoholic fermentation?
Ethanol and carbon dioxide.
Both fermentation and aerobic respiration begin with what process?
Glycolysis.
Cause → Effect: Glucose is broken down in fermentation. What is produced?
Lactic acid (or ethanol and CO2).
What is one similarity between fermentation and aerobic respiration?
Both processes generate ATP.
What type of organism typically undergoes lactic acid fermentation?
Muscle cells in animals and some bacteria.
In terms of energy efficiency, how do fermentation and aerobic respiration compare?
Aerobic respiration is more energy-efficient than fermentation.
True or False: Fermentation can occur in eukaryotic cells.
True. Many eukaryotic cells, like yeast, perform fermentation.
What is produced during lactic acid fermentation?
Lactic acid and ATP.
State one difference in the end products of fermentation vs aerobic respiration.
Fermentation produces lactic acid or alcohol; aerobic respiration produces carbon dioxide and water.
Fill in the blank: ATP is generated in fermentation through _____ phosphorylation.
Substrate-level.
Comparison: Fermentation vs aerobic respiration energy yield.
Fermentation: 2 ATP. Aerobic respiration: 36-38 ATP.
What is the primary purpose of fermentation?
To regenerate NAD+ for glycolysis to continue.
Cause → Effect: Oxygen is present during cellular respiration. What occurs?
Aerobic respiration proceeds, yielding more ATP.
Questions in this Study Set(48)
1. What is the first stage of aerobic respiration?
2. What is the end product of alcoholic fermentation in yeast?
3. What is the primary electron acceptor in aerobic respiration?
4. Where does the Krebs cycle take place within the cell?
5. During lactic acid fermentation, which molecule is produced?
6. Which of the following organisms is most likely to perform fermentation?
7. True or False: Aerobic respiration can occur in the absence of oxygen.
8. Which of the following conditions is necessary for fermentation to take place?
9. What is the main purpose of glycolysis in both fermentation and aerobic respiration?
10. Fill in the blank: The main product of the Krebs cycle is __________.
11. What is one primary advantage of fermentation in food production?
12. Which of the following is NOT a product of alcoholic fermentation?
13. How many ATP are produced in the Krebs cycle per glucose molecule?
14. How many ATP molecules are generated during lactic acid fermentation?
15. In terms of ATP yield, how do fermentation and aerobic respiration compare?
16. What is the role of oxygen in aerobic respiration?
17. Which of the following is NOT a product of alcoholic fermentation?
18. What molecule is regenerated during fermentation to continue glycolysis?
19. Cause → Effect: High levels of oxygen are available. What is likely to happen?
20. What role does NAD+ play in fermentation?
21. Which of these processes occurs in the absence of oxygen?
22. What byproducts are generated during aerobic respiration?
23. Identify one industry where lactic acid fermentation is crucial.
24. During which process is lactic acid produced?
25. Where does the Electron Transport Chain occur within the cell?
26. Which of the following accurately compares alcoholic and lactic acid fermentation?
27. What is the total estimated ATP yield from one glucose molecule during aerobic respiration?
28. How is the majority of ATP generated in aerobic respiration?
29. Which substrate is commonly fermented by yeast to produce alcohol?
30. Which process is characterized by substrate-level phosphorylation?
31. What is the net gain of ATP from glycolysis?
32. True or False: Lactic acid fermentation can occur in human muscle cells.
33. What gas is a byproduct of alcoholic fermentation?
34. Which of the following statements is NOT true regarding aerobic respiration?
35. What is the main purpose of fermentation in energy production?
36. Which of the following is a final product of aerobic respiration?
37. Calculate the total ATP yield from one glucose molecule, considering glycolysis, Krebs cycle, and the Electron Transport Chain.
38. How efficient is fermentation compared to aerobic respiration?
39. Which statement about fermentation is true?
40. What happens to pyruvate when oxygen is present?
41. What effect does lactic acid buildup have during strenuous exercise?
42. Which of the following processes starts with glycolysis?
43. True or False: The total yield of ATP from one complete cycle of Krebs is approximately 38.
44. True or False: Fermentation occurs in all organisms.
45. Which of the following statements about ATP production is true?
46. Which of the following processes produces the most ATP during aerobic respiration?
47. Which of the following best describes the process of alcoholic fermentation?
48. In which of the following scenarios would fermentation occur instead of aerobic respiration?
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