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Biology - Respiration in Plants

Practise 54 MHT-CET (PCB) previous year questions on Respiration in Plants, compiled from papers in 2026. Each question is pulled directly from the actual exam paper it appeared in, so you're practising in the exact style and difficulty MHT-CET (PCB) tests.

Respiration in Plants has been asked in 1 of the 1 years of MHT-CET (PCB) papers analysed (2026), with 54 questions in all. 44% of them were easy, 50% moderate and 6% tough. Most of its questions came from 2026, with 54 questions that year. In 2026 it had 54 questions across 11 papers, about 4.9 per paper.

The chapter's 6 topics are not weighted equally: Aerobic Respiration (24 questions, 44%), Glycolysis (19 questions, 35%), and Fermentation (5 questions, 9%) have been asked the most. Aerobic Respiration has produced the most tough questions (3).

  1. 1What is the site of Krebs cycle in mitochondria?26 Apr, 2026 (M)Aerobic Respiration
  2. 2Identify the correct sequence of cytochromes involved in ETS.26 Apr, 2026 (M)Aerobic Respiration
  3. 3How many ATP molecules are utilized in the glycolysis of a glucose molecule?26 Apr, 2026 (M)Glycolysis
  4. 4Which one of the following conversion in glycolysis shows formation of water molecules from the substrate?26 Apr, 2026 (M)Glycolysis
  5. 5Select the set of correct statements regarding ETS in aerobic respiration. A. catalyses the synthesis of ATP from ADP. B. Protons are channe26 Apr, 2026 (M)Aerobic Respiration
  6. 6Glycolysis ends in formation of ________ .25 Apr, 2026 (M)Glycolysis
  7. 7The movement of protons during ATP synthesis in mitochondria takes place from outer chamber into inner chamber by part of oxysome present in25 Apr, 2026 (M)Aerobic Respiration
  8. 8How many ATP molecules are produced thorough ETS, out of 38 molecules produced after complete oxidation of one glucose molecule?25 Apr, 2026 (M)Aerobic Respiration
  9. 9R.Q. is ratio of volume of25 Apr, 2026 (M)Respiratory Quotient
  10. 10The process in which food is oxidized and ATP is generated is called ________ .25 Apr, 2026 (M)Cellular Respiration
  11. 11Which one of the following is the activator for enzyme hexokinase in glycolysis?25 Apr, 2026 (E)Glycolysis
  12. 12Respiratory quotient is represented as _______25 Apr, 2026 (E)Respiratory Quotient
  13. 13Oxidation of one leads to production of _________ ATP molecules.25 Apr, 2026 (E)Aerobic Respiration
  14. 14Identify the INCORRECT statement regarding glycolysis. There is _________.25 Apr, 2026 (E)Glycolysis
  15. 15Given below are two statements. Statement I - Protons are channeled from inner chamber of mitochondria into outer chamber by part of oxysome25 Apr, 2026 (E)Aerobic Respiration
  16. 16Given below are two statements: Statement (I): There is accumulation of lactic acid in skeletal muscles during vigorous exercise. Statement 24 Apr, 2026 (M)Fermentation
  17. 17The ultimate electron acceptor in ETS in aerobic respiration is ___________ and it reacts with protons to form ________.24 Apr, 2026 (M)Aerobic Respiration
  18. 18Glycolysis occurs in _____________24 Apr, 2026 (M)Glycolysis
  19. 19Total number of ATP molecules utilised in one glycolytic pathway is _________.24 Apr, 2026 (M)Glycolysis
  20. 20Find the CORRECT statements from the following and choose the correct option. (A). Glycolysis (EMP pathway) is a common path for aerobic and24 Apr, 2026 (E)Glycolysis
  21. 21During lactic acid fermentation, pyruvic acid is reduced to lactic acid using one proton and two electrons from ________________.24 Apr, 2026 (E)Fermentation
  22. 22Where does the end product of Glycolysis undergoes aerobic oxidation in eukaryotes?24 Apr, 2026 (E)Glycolysis
  23. 23In Krebs' cycle, GTP is produced during the conversion of ___.24 Apr, 2026 (E)Aerobic Respiration
  24. 24Given below are two statements: Statement (I): ( ) and that are produced during glycolysis, connecting link reaction and Krebs cycle, are ox24 Apr, 2026 (E)Aerobic Respiration
  25. 25Which enzyme is responsible for phosphorylation of glucose with ATP?23 Apr, 2026 (M)Glycolysis
  26. 26How many glucose molecules are utilized if the cell produces 68 pyruvic acid molecules during glycolysis?23 Apr, 2026 (M)Glycolysis
  27. 27Which cytochrome acts as a mobile electron carrier, transferring electrons between complex III and IV during ETS?23 Apr, 2026 (M)Aerobic Respiration
  28. 28During aerobic respiration, the total number of ATP formed from one glucose molecule through substrate level phosphorylation is ------------23 Apr, 2026 (M)Glycolysis
  29. 29In glycolysis, which enzyme requires as cofactor?23 Apr, 2026 (E)Glycolysis
  30. 30Identify the step, in which phosphorylation occurs with the help of inorganic phosphate and not ATP.23 Apr, 2026 (E)Glycolysis
  31. 31Which of the following coenzyme is NOT directly required in any of the steps of the Kreb's cycle?23 Apr, 2026 (E)Aerobic Respiration
  32. 32-Ketoglutarate and Oxaloacetate act as precursors in the synthesis of ______.23 Apr, 2026 (E)Amphibolic Pathway
  33. 33If glucose is incompletely oxidized to ethyl alcohol in the absence of oxygen, the RQ will be ______.23 Apr, 2026 (E)Fermentation
  34. 34Which of the following processes adds to the atmosphere?23 Apr, 2026 (E)Cellular Respiration
  35. 35The protons released during the oxidation of NADH+H and FADH in mitochondria follow the paths given below EXCEPT:22 Apr, 2026 (M)Aerobic Respiration
  36. 36Given below are two statements: Statement (I): The rate of glycolysis is controlled by ATP consumption, regeneration and enzymes like hexoki22 Apr, 2026 (M)Glycolysis
  37. 37Given below are two statements regarding anaerobic respiration in the muscles. Statement (I): In muscles, NADH+H produced during glycolysis 22 Apr, 2026 (M)Glycolysis
  38. 38Given below are four respiratory enzymes. Arrange them in the decreasing order of number of carbon atoms present in the substrates they act 22 Apr, 2026 (M)Aerobic Respiration
  39. 39Which one of the following intermediate metabolites is common for aerobic break down of glucose, aminoacid and fatty acids?22 Apr, 2026 (M)Aerobic Respiration
  40. 40If the volume of evolved during respiration is less than the oxygen consumed, then the respiratory substrate would be ____.22 Apr, 2026 (E)Respiratory Quotient
  41. 41During ETS, when ubiquinol is oxidized by the cytochrome complex, the electrons released are transferred to ____.22 Apr, 2026 (E)Aerobic Respiration
  42. 42The formation of ATP by oxidative phosphorylation takes place in ____.22 Apr, 2026 (E)Aerobic Respiration
  43. 43Which one of the following respiratory reactions does NOT yield ?22 Apr, 2026 (E)Fermentation
  44. 44Which one of the following reactions, ADP/ATP is not involved in phosphorylation?22 Apr, 2026 (E)Glycolysis
  45. 45Substrate level phosphorylation occurs --------------------.21 Apr, 2026 (M)Glycolysis
  46. 46During glycolysis, which one of the following intermediates undergoes oxidation as well as phosphorylation?21 Apr, 2026 (M)Glycolysis
  47. 47Which organic acid is produced at the end of the TCA cycle?21 Apr, 2026 (M)Aerobic Respiration
  48. 48Given below are two statements related to Kreb's cycle. Statement (I): There are four steps of oxidation in Kreb's cycle, catalyzed by dehyd21 Apr, 2026 (M)Aerobic Respiration
  49. 49Given below are two statements: Statement (I): In aerobic respiration, hydrogen removed from respiratory material combines with oxygen to fo21 Apr, 2026 (M)Aerobic Respiration
  50. 50In Yeast, the pyruvate is decarboxylated to form----21 Apr, 2026 (E)Fermentation

Frequently Asked Questions

1.How many questions are available for Respiration in Plants?

This chapter includes 54 questions compiled from MHT-CET (PCB) papers in 2026.

2.Are these questions only from MHT-CET (PCB), or from other exams too?

These are MHT-CET (PCB) questions specifically for the Respiration in Plants chapter. Questions from other exams like NEET or AIIMS are organised separately under their respective exam sections.

3.Is Respiration in Plants an important chapter for MHT-CET (PCB) Biology?

Respiration in Plants has appeared in 1 of the 1 year of MHT-CET (PCB) papers covered here, with 54 questions across 11 papers - about 5 per paper it appears in.

4.What is the difficulty level of Respiration in Plants questions in MHT-CET (PCB)?

Of the 54 questions analysed for this chapter, 44% are easy, 50% moderate and 6% tough. 2026 had the most, with 54 questions.

5.Which topics in Respiration in Plants should I focus on?

These topics have carried the most weightage in Respiration in Plants:

  • Aerobic Respiration - 24 questions (44%)
  • Glycolysis - 19 questions (35%)
  • Fermentation - 5 questions (9%)
  • Aerobic Respiration has produced the most tough questions (3).
6.Is Respiration in Plants's weightage in MHT-CET (PCB) going up or down?

Across all 11 papers analysed, Respiration in Plants has averaged about 4.9 questions per paper. In 2026, that average has stayed about the same, at about 4.9 questions per paper. Use the year-wise numbers on this page for the exact trend before you decide how much time to give it.