NeetVictoryQuestion 1: Fermentation and Electron Transport Chain
The terminal electron acceptor in the electron transport chain is:
- A NAD⁺
- B the cytochrome b
- C FAD
- D oxygen
Answer: D. oxygen
Why: The oxygen is reduced to the water.
NEET Biology: Respiration in Plants. Chapter-wise Practice Questions and Test
Respiration in Plants is a Class 11 Biology chapter that carries about 1.6% of the Biology questions in NEET. Practise it with 43 questions covering 4 topics, each with an explanation.
Practise Respiration in Plants
Open in the appSets of 15 questions that adapt to your level, with an explanation for every answer.
Topics covered in Respiration in Plants
- Fermentation and Electron Transport Chain (20 questions)
- Glycolysis and Fermentation (3 questions)
- Glycolysis and Krebs Cycle (18 questions)
- Krebs Cycle and Electron Transport (2 questions)
How often Respiration in Plants has come up in NEET
Across the 13 previous year papers, Respiration in Plants had 19 questions, about 1.5 a year. The most in one paper was 3, in NEET 2023.
| Paper | Questions from this chapter |
|---|---|
| NEET 2026 | 2 |
| NEET 2025 | 1 |
| NEET 2024 | 3 |
| NEET 2023 | 3 |
| NEET 2022 | 2 |
| NEET 2021 | 1 |
| NEET 2020 | 1 |
| NEET 2019 | 2 |
| NEET 2018 | 2 |
| NEET 2017 | 1 |
| NEET 2016 | 0 |
| Re-AIPMT 2015 | 0 |
| AIPMT 2014 | 1 |
Sample questions on Respiration in Plants with answers
8 questions from the practice bank, spread across the chapter's topics. The full set is in the app.
Question 2: Glycolysis and Fermentation
Glycolysis, the breakdown of glucose to pyruvate, occurs in the:
- A mitochondrial matrix
- B cytoplasm
- C nucleus
- D chloroplast
Answer: B. cytoplasm
Why: Glycolysis takes place in the cytoplasm and does not require oxygen, yielding a net gain of 2 ATP and 2 pyruvate molecules per glucose.
Question 3: Glycolysis and Krebs Cycle
In each turn of the Krebs cycle, the number of the NADH, FADH₂ and GTP (ATP) produced is:
- A 1 NADH, 3 FADH₂ and 3 GTP
- B 4 FADH₂
- C 2 NADH only
- D 3 NADH, 1 FADH₂ and 1 GTP
Answer: D. 3 NADH, 1 FADH₂ and 1 GTP
Why: Two CO₂ molecules are released.
Question 4: Krebs Cycle and Electron Transport
The respiratory quotient (RQ) for the complete oxidation of a fat is generally:
- A equal to 1
- B less than 1
- C greater than 1
- D equal to 0
Answer: B. less than 1
Why: Fats contain proportionally less oxygen than carbohydrates, so their oxidation consumes more O2 relative to CO2 released, giving an RQ below 1 (around 0.7).
Question 5: Fermentation and Electron Transport Chain
The complex IV of the ETS is the:
- A the cytochrome bc₁ complex
- B succinate dehydrogenase
- C NADH dehydrogenase
- D cytochrome c oxidase, containing the cytochromes a and a₃ and two copper centres
Answer: D. cytochrome c oxidase, containing the cytochromes a and a₃ and two copper centres
Why: It transfers the electrons to the O₂.
Question 6: Glycolysis and Fermentation
During strenuous exercise, muscle cells running short of oxygen convert pyruvate into:
- A glucose
- B lactic acid
- C ethanol
- D acetyl CoA only
Answer: B. lactic acid
Why: Lactate formation regenerates the NAD⁺ needed to keep glycolysis going.
Question 7: Glycolysis and Krebs Cycle
The Krebs cycle (citric acid cycle) takes place in the:
- A cytoplasm
- B mitochondrial matrix
- C thylakoid membrane
- D nucleolus
Answer: B. mitochondrial matrix
Why: The Krebs cycle occurs in the mitochondrial matrix, completing the oxidation of pyruvate-derived acetyl-CoA and releasing CO2.
Question 8: Krebs Cycle and Electron Transport
Complete aerobic oxidation of one molecule of glucose yields a net gain of approximately how many ATP?
- A 2
- B 8
- C 36-38
- D 100
Answer: C. 36-38
Why: Combining glycolysis, the Krebs cycle and oxidative phosphorylation, complete aerobic respiration of one glucose molecule yields approximately 36 to 38 ATP.
Practise all of Respiration in Plants
Open in the appFrequently asked questions
How many questions come from Respiration in Plants in NEET?
Respiration in Plants carries about 1.6% of the Biology questions in NEET. Across the 13 previous year papers on NeetVictory it appeared 19 times, about 1.5 questions a year.
Which class is Respiration in Plants from?
Respiration in Plants is a Class 11 Biology chapter in the NCERT syllabus.
Where can I practise Respiration in Plants questions for NEET?
NeetVictory has 43 practice questions on Respiration in Plants, each with an explanation, in sets of 15 that adapt to your level. This page shows a free sample.