NEET-UG Biology · Class 11
Fermentation — NEET & JEE Questions
Fermentation is a topic in Respiration in Plants, a Class 11 Biology chapter of the NEET-UG syllabus. TestBudy holds 12 published NEET-UG questions on Fermentation, each with the marking scheme of the real paper.
- questions
- 12
- shown here
- 10
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Fermentation MCQs with solutions
10 of the 12 published questions on this topic, exactly as they appear in a test. Answers and worked solutions come with your result rather than on this page.
Which end products are formed during alcoholic fermentation in yeast?
- A. Lactate and carbon dioxide
- B. Ethanol and carbon dioxide
- C. Acetyl-CoA and oxygen
- D. Pyruvate and water
What is the main metabolic purpose of fermentation after glycolysis?
- A. To oxidise acetyl-CoA in the Krebs cycle
- B. To generate large amounts of ATP in mitochondria
- C. To regenerate NAD+ from NADH
- D. To split oxygen into reactive atoms
The main metabolic purpose of fermentation after glycolysis is to
- A. regenerate NAD+ so glycolysis can continue
- B. produce large amounts of ATP in mitochondria
- C. oxidise glucose completely to carbon dioxide and water
- D. replace glycolysis
In alcoholic fermentation, pyruvate is converted ultimately into
- A. ethanol and carbon dioxide
- B. lactate only
- C. acetyl-CoA and oxygen
- D. glucose and water
What amount of energy is released from glucose during lactic acid fermentation?
- A. Approximately 15%
- B. More than 18%
- C. About 10%
- D. Less than 7%
Muscle cells temporarily rely more on lactic acid fermentation when oxygen delivery cannot meet demand. What immediate advantage does this provide?
- A. It prevents glucose from entering glycolysis
- B. It increases the ATP yield of the Krebs cycle
- C. It converts lactate directly into oxygen
- D. It restores NAD+ needed for glycolysis
During intense exercise, muscle cells may convert pyruvate to lactate. This helps maintain glycolysis by
- A. regenerating NAD+ from NADH
- B. producing oxygen
- C. increasing mitochondrial electron transport directly
- D. forming large amounts of ATP from lactate
A yeast culture is deprived of oxygen but supplied with abundant glucose. Which products should increase?
- A. Ethanol and carbon dioxide
- B. Only water and carbon dioxide from complete aerobic oxidation
- C. Oxygen and pyruvate only
- D. Urea and ammonia
Yeast cells are supplied with abundant glucose but no oxygen. They continue producing ATP at a low rate and release carbon dioxide. Which process best explains both observations?
- A. Glycolysis coupled to alcoholic fermentation
- B. Krebs cycle coupled to oxidative phosphorylation
- C. Only the electron transport chain
- D. Photorespiration
Why does fermentation yield much less ATP per glucose than aerobic respiration?
- A. Most of the glucose's chemical energy remains in reduced organic end products
- B. Fermentation produces no ATP at all
- C. Fermentation completely oxidises glucose
- D. Fermentation uses the electron transport chain more efficiently
Common mistakes in Fermentation
Recorded against questions in this topic that are not shown above, so none of these points at an answer you can see on this page.
- Focusing on ethanol as the important product rather than NAD+ regeneration as the essential function.
- Assumes NADH can substitute directly for NAD+ as the electron acceptor.
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