+20 Questions on Fermentation
20 multiple-choice questions about Fermentation, each with five alternatives (A–E). The answers are provided at the end.
Multiple Choice Questions: Fermentation
1. What is fermentation?
A) A type of aerobic respiration
B) The breakdown of glucose in the presence of oxygen
C) The conversion of glucose to alcohol or acid in absence of oxygen
D) The conversion of pyruvate to CO₂
E) A form of photosynthesis
2. Which of the following is a common product of alcoholic fermentation?
A) Lactic acid
B) Ethanol
C) Acetyl-CoA
D) Glucose
E) Oxygen
3. Which organism typically performs alcoholic fermentation?
A) Humans
B) Bacteria
C) Yeast
D) Algae
E) Plants
4. Which product is formed during lactic acid fermentation in muscles?
A) Ethanol
B) Pyruvate
C) Lactic acid
D) CO₂
E) Glucose
5. Fermentation occurs in the absence of which molecule?
A) Glucose
B) Carbon dioxide
C) Oxygen
D) Water
E) Lactic acid
6. Which stage of cellular respiration is common to both aerobic respiration and fermentation?
A) Krebs cycle
B) Electron transport chain
C) Glycolysis
D) Oxidative phosphorylation
E) Photosynthesis
7. How many net ATP molecules are produced per glucose molecule in fermentation?
A) 0
B) 1
C) 2
D) 4
E) 36
8. Which of the following is NOT a type of fermentation?
A) Lactic acid fermentation
B) Alcoholic fermentation
C) Acetic acid fermentation
D) Citric acid fermentation
E) Mixed acid fermentation
9. Which molecule is reduced during fermentation?
A) NAD⁺
B) NADH
C) FADH₂
D) CO₂
E) ATP
10. What is the purpose of fermentation for cells?
A) To produce oxygen
B) To create glucose
C) To regenerate NAD⁺
D) To make lactic acid
E) To use oxygen efficiently
11. Lactic acid fermentation occurs in which part of the cell?
A) Nucleus
B) Mitochondria
C) Cytoplasm
D) Ribosome
E) Cell membrane
12. What is the starting molecule for fermentation?
A) Lactic acid
B) Ethanol
C) Acetyl-CoA
D) Pyruvate
E) Water
13. In alcoholic fermentation, how many carbon dioxide molecules are released per glucose molecule?
A) 0
B) 1
C) 2
D) 3
E) 4
14. Which industry uses alcoholic fermentation extensively?
A) Dairy
B) Meat processing
C) Brewing
D) Textile
E) Electronics
15. What happens to the NADH produced in glycolysis during fermentation?
A) It enters the mitochondria
B) It is used in the Krebs cycle
C) It is oxidized to NAD⁺
D) It produces water
E) It is stored in the nucleus
16. Which of the following is a facultative anaerobe capable of both fermentation and aerobic respiration?
A) Human red blood cells
B) E. coli
C) Yeast
D) Amoeba
E) Algae
17. Why does fermentation produce less ATP than aerobic respiration?
A) It uses less glucose
B) It uses ATP to create NAD⁺
C) It doesn't use the mitochondria
D) It stops after glycolysis
E) It consumes oxygen
18. What gas is produced during alcoholic fermentation?
A) Hydrogen
B) Nitrogen
C) Methane
D) Carbon dioxide
E) Oxygen
19. Which of the following is a fermented food?
A) Apple
B) Bread
C) Cheese
D) Both B and C
E) None
20. What kind of fermentation is used in yogurt production?
A) Alcoholic fermentation
B) Acetic acid fermentation
C) Lactic acid fermentation
D) Butyric acid fermentation
E) Mixed acid fermentation
- Questions about Electron Transport (Electron Transport Chain - ETC)
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- +20 Questions on Glycolysis
Answer Key
1. C
2. B
3. C
4. C
5. C
6. C
7. C
8. D
9. A
10. C
11. C
12. D
13. C
14. C
15. C
16. C
17. D
18. D
19. D
20. C
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