NCERT CLASS 11 | TOPIC : PLANT PHYSIOLOGY-RESPIRATION | PYQB (LATEST) | NEET BIOLOGY ONLINE TEST

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NCERT CLASS 11 | TOPIC : PLANT PHYSIOLOGY-RESPIRATION | PYQB (LATEST) | NEET BIOLOGY ONLINE TEST

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It contains 00 important questions. Choose the most correct answer. Then check your answer. Try again if there are errors. Regards : www.onlinetest.kalvisolai.com

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1 ➤ 1. Given below are two statements
Assertion (A): ATP is used at two steps in glycolysis.
Reason (R): First ATP is used in converting glucose into glucose-6-phosphate and second ATP is used in conversion of fructose-6-phosphate into fructose-1-6-diphosphate.

(a) (A) is true but (R) is false. (b) (A) is false but (R) is true. (c) Both (A) and (R) are true and (R) is the correct explanation of (A). (d) Both (A) and (R) are true but (R) is not the correct explanation of (A). (2023)

2 ➤ 2. Conversion of glucose to glucose-6-phosphate, the first irreversible reaction of glycolysis, is catalysed by (2019)

(a) phosphofructokinase (b) aldolase (c) hexokinase (d) enolase.

3 ➤ 3. What is the role of NAD+ in cellular respiration? (2018)

(a) It functions as an enzyme. (b) It functions as an electron carrier. (c) It is a nucleotide source for ATP synthesis. (d) It is the final electron acceptor for anaerobic respiration.

4 ➤ 4. In glycolysis, during oxidation electrons are removed by (2004)

(a) ATP (b) glyceraldehyde-3-phosphate (c) NAD+ (d) molecular oxygen.

5 ➤ 5. At the end of glycolysis, six carbon compound ultimately changes into (1996)

(a) ethyl alcohol (b) acetyl Co-A (c) pyruvic acid (d) ATP.

6 ➤ 6. The first phase in the breakdown of glucose, in animal cell, is (1994)

(a) fermentation (b) Krebs cycle (c) glycolysis (d) ETS.

7 ➤ 7. End product of glycolysis is (1990)

(a) acetyl CoA (b) pyruvic acid (c) glucose 1-phosphate (d) fructose 1-phosphate.

8 ➤ 8. What amount of energy is released from glucose during lactic acid fermentation? (2022)

(a) Approximately 15% (b) More than 18% (c) About 10% (d) Less than 7%

9 ➤ 9. In which one of the following processes CO, is not released? (2014)

(a) Aerobic respiration in plants (b) Aerobic respiration in animals (c) Alcoholic fermentation (d) Lactate fermentation

10 ➤ 10. The energy-releasing metabolic process in which substrate is oxidised without an external electron acceptor is called (2010, 2008)

(a) glycolysis (b) fermentation (c) aerobic respiration (d) photorespiration.

11 ➤ 11. In alcohol fermentation (2003)

(a) triose phosphate is the electron donor while acetaldehyde is the electron acceptor (b) triose phosphate is the electron donor while pyruvic acid is the electron acceptor (c) there is no electron donor (d) oxygen is the electron acceptor.

12 ➤ 12. The end product of fermentation are (1997)

(a) O₂ and C₂H₂OH (b) CO₂ and acetaldehyde (c) CO₂ and O₂ (d) CO₂ and C₂H₂OH.

13 ➤ 13. Which of the following products are obtained by anaerobic respiration from yeast? (1996)

(a) Beer and wine (b) Alcohols (c) CO₂ (d) All of these

14 ➤ 14. When yeast ferments glucose, the products obtained are....(1994)

(a) ethanol and CO₂ (b) methanol and CO₂ (c) ethanol and water (d) water and CO₂,

15 ➤ 15. Match List I with List II:

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A. Oxidative decarboxylation - 1. Citrate synthase

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B. Glycolysis - II. Pyruvate dehydrogenase

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C. Oxidative phosphorylation - III. Electron transport system

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D. Tricarboxylic acid cycle - IV. EMP pathway (2023)

(a) A-III, B-I, C-II, D-IV (b) A-II, B-IV, C-III, D-I (c) A-III, B-IV, C-II, D-I (d) A-II, B-IV, C-I, D-III

16 ➤ 16. The number of substrate level phosphorylations in one turn of citric acid cycle is (2020)

(a) zero (b) one (c) two (d) three.

17 ➤ 17. Where is respiratory electron transport system (ETS) located in plants? (Odisha NEET 2019)

(a) Mitochondrial matrix (b) Outer mitochondrial membrane (c) Inner mitochondrial membrane (d) Intermembrane space

18 ➤ 18. Which of these statements is incorrect? (2018)

(a) Enzymes of TCA cycle are present in mitochondrial matrix. (b) Glycolysis occurs in cytosol. (c) Glycolysis operates as long as it is supplied with NAD that can pick up hydrogen atoms. (d) Oxidative phosphorylation takes place in outer mitochondrial membrane.

19 ➤ 19. Which statement is wrong for Krebs cycle? (2017)

(a) There is one point in the cycle where FAD+ is reduced to FADH2- (b) During conversion of succinyl CoA to succinic acid, a molecule of GTP is synthesised. (c) The cycle starts with condensation of acetyl group (acetyl CoA) with pyruvic acid to yield citric acid. (d) There are three points in the cycle where NAD+ is reduced to NADH + H+

20 ➤ 20. Oxidative phosphorylation is (NEET-II 2016)

(a) formation of ATP by transfer of phosphate group from a substrate to ADP (b) oxidation of phosphate group in ATP (c) addition of phosphate group to ATP (d) formation of ATP by energy released from electrons removed during substrate oxidation.

21 ➤ 21. Cytochromes are found in (2015 Cancelled)

(a) cristae of mitochondria (b) lysosomes (c) matrix of mitochondria (d) outer wall of mitochondria.

22 ➤ 22. In mitochondria, protons accumulate in the (Mains 2011)

(a) outer membrane (b) inner membrane (c) intermembrane space (d) matrix.

23 ➤ 23. All enzymes of TCA cycle are located in the mitochondrial matrix except one which is located in inner mitochondrial membranes in eukaryotes and in cytosol in prokaryotes. This enzyme is (2007)

(a) isocitrate dehydrogenase (b) malate dehydrogenase (c) succinate dehydrogenase (d) lactate dehydrogenase.

24 ➤ 24. In which one of the following do the two names refer to one and the same thing? (2003)

(a) Krebs' cycle and Calvin cycle (b) Tricarboxylic acid cycle and citric acid cycle (c) Citric acid cycle and Calvin cycle (d) Tricarboxylic acid cycle and urea cycle

25 ➤ 25. Cytochrome is (2001)

(a) metallo flavo protein (b) Fe containing porphyrin pigment (c) glycoprotein (d) lipid.

26 ➤ 26. Which one of the following statements about cytochrome P450 is wrong? (1998)

(a) It is a coloured cell. (b) It is an enzyme involved in oxidation reactions. (c) It has an important role in metabolism. (d) It contains iron.

27 ➤ 27. Which of the following is the key intermediate compound linking glycolysis to the Krebs' cycle? (1997)

(a) Malic acid (b) Acetyl CoA (c) NADH (d) ATP

28 ➤ 28. In Krebs' cycle, the FAD precipitates as electron acceptor during the conversion of (1997)

(a) fumaric acid to malic acid (b) succinic acid to fumaric acid (c) succinyl CoA to succinic acid (d) a-ketoglutarate to succinyl CoA.

29 ➤ 29. The correct sequence of electron acceptor in ATP synthesis is (1997)

(a) Cyt. b, c, a3, a (b) Cyt. c, b, a, a3 (c) Cyt. a, a, b, c (d) Cyt. b, c, a, a3

30 ➤ 30. The 1992 Nobel Prize for medicine was awarded to Edmond H. Fischer and Edwin J. Krebs for their work concerning (1994)

(a) reversible protein phosphorylation as a biological regulation mechanism (b) isolation of the gene for a human disease (c) human genome project (d) drug designing involving inhibition of DNA synthesis of the pathogen.

31 ➤ 31. End product of citric acid cycle/Krebs' cycle is (1993)

(a) citric acid (b) lactic acid (c) pyruvic acid (d) CO₂+ H₂O.

32 ➤ 32. Oxidative phosphorylation is production of (1992)

(a) ATP in photosynthesis (b) NADPH in photosynthesis (c) ATP in respiration (d) NADH in respiration.

33 ➤ 33. End products of aerobic respiration are (1992)

(a) sugar and oxygen (b) water and energy (c) carbon dioxide, water and energy (d) carbon dioxide and energy.

34 ➤ 34. Terminal cytochrome of respiratory chain which donates electrons to oxygen is (1992)

(a) Cyt b (b) Cyt c (c) Cyta1 (d) Cyt a3.

35 ➤ 35. Connecting link between glycolysis and Krebs' cycle before pyruvate entering Krebs' cycle is changed to (1990)

(a) oxaloacetate (b) PEP (c) pyruvate (d) acetyl CoA.

36 ➤ 36. What is the net gain of ATP when each molecule of glucose is converted to two molecules of pyruvic acid? (2022)

(a) Four (b) Six (c) Two (d) Eight

37 ➤ 37 . Which of the following statements is incorrect? (2021)

(a) Oxidation-reduction reactions produce proton gradient in respiration. (b) During aerobic respiration, role of oxygen is limited to the terminal stage. (c) In ETC (Electron Transport Chain), one molecule of NADH + H gives rise to 2 ATP molecules, and one FADH, gives rise to 3 ATP molecules. (d) ATP is synthesised through complex V.

38 ➤ 38. The three boxes in this diagram represent the three major biosynthetic pathways in aerobic respiration. Arrows represent net reactants or products.

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(2013)

(a) H₂O (b) FAD+ or FADH2 (c) NADH (d) ATP.

39 ➤ 39. The overall goal of glycolysis, Krebs' cycle and the electron transport system is the formation of (2007)

(a) ATP in one large oxidation reaction (b) sugars (c) nucleic acids (d) ATP in small stepwise units.

40 ➤ 40. How many ATP molecules could maximally be generated from one molecule of glucose, if the complete oxidation of one mole of glucose to CO₂ and H₂O yields 686 kcal and the useful chemical energy available in the high energy phosphate bond of one mole of ATP is 12 kcal? (2006)

(a) 1 (b) 2 (c) 30 (d) 57

41 ➤ 41. During which stage in the complete oxidation of glucose are the greatest number of ATP molecules formed from ADP? (2005)

(a) Glycolysis (b) Krebs' cycle (c) Conversion of pyruvic acid to acetyl CoA (d) Electron transport chain

42 ➤ 42. How many ATP molecules are produced by aerobic oxidation of one molecule of glucose? (2002)

(a) 2 (b) 4 (c) 38 (d) 34

43 ➤ 43. Net gain of ATP molecules, during aerobic respiration, is (1999)

(a) 40 molecules (b) 48 molecules (c) 36 molecules (d) 38 molecules.

44 ➤ 44. When one molecule of ATP is disintegrated, what amount of energy is liberated? (1996)

(a) 8 kcal (b) 38 kcal (c) 7 kcal (d) 4.5 kcal

45 ➤ 45. The ultimate respiratory substrate, yielding maximum number of ATP molecules, is (1994)

(a) glycogen (b) ketogenic amino acid (c) glucose (d) amylose.

46 ➤ 46. Out of 38 ATP molecules produced per glucose, 32 ATP molecules are formed from NADH/FADH2 in (1993)

(a) respiratory chain (b) Krebs' cycle (c) oxidative decarboxylation (d) EMP.

47 ➤ 47. When one glucose molecule is completely oxidised, it changes (1992)

(a) 36 ADP molecules into 36 ATP molecules (b) 38 ADP molecules into 38 ATP molecules (c) 30 ADP molecules into 30 ATP molecules (d) 32 ADP molecules into 32 ATP molecules.

48 ➤ 48. Out of 36 ATP molecules produced per glucose molecule during respiration (1992)

(a) 2 are produced outside glycolysis and 34 during respiratory chain (b) 2 are produced outside mitochondria and 34 inside mitochondria (c) 2 during glycolysis and 34 during Krebs' cycle (d) all are formed inside mitochondria.

49 ➤ 49. EMP can produce a total of (1990)

(a) 6 ATP (b) 8 ATP (c) 24 ATP (d) 38 ATP.

50 ➤ 50. Which of the following biomolecules is common to respiration-mediated breakdown of fats, carbohydrates and proteins? (NEET-II 2016)

(a) Glucose-6-phosphate (b) Fructose 1, 6-bisphosphate (c) Pyruvic acid (d) Acetyl CoA

51 ➤ 51. Which of the metabolites is common to respiration- mediated breakdown of fats, carbohydrates and proteins? (2013)

(a) Pyruvic acid (b) Acetyl CoA (c) Glucose-6-phosphate (d) Fructose 1, 6 - bisphosphate

52 ➤ 52. Aerobic respiratory pathway is appropriately termed (2009)

(a) parabolic (b) amphibolic (c) anabolic (d) catabolic.

53 ➤ 53. Plants, but not animals, can convert fatty acids to sugars by a series of reactions called (1994)

(a) photosynthesis (b) Kreb's cycle (c) glycolysis (d) glyoxylate cycle.

54 ➤ 54. Link between glycolysis, Krebs' cycle and B-oxidation of fatty acid or carbohydrate and fat metabolism is (1988)

(a) oxaloacetic acid (b) succinic acid (c) citric acid (d) acetyl CoA.

55 ➤ 55. NADP is reduced to NADPH in (1992)

(a) HMP (b) Calvin Cycle (c) glycolysis (d) EMP.

56 ➤ 56. Respiratory Quotient (RQ) value of tripalmitin is (2019)

(a) 0.09 (b) 0.9 (c) 0.7 (d) 0.07

57 ➤ 57. Apparatus to measure rate of respiration and R.Q. is (1992)

(a) auxanometer (b) potometer (c) respirometer (d) manometer.

58 ➤ 58. R.Q. is ratio of (1990)

(a) CO₂ produced to substrate consumed (b) CO₂ produced to O₂ consumed (c) oxygen consumed to water produced (d) oxygen consumed to CO₂ produced.

59 ➤ 59. R.Q. is (1988)

(a) C/N (b) N/C (c) CO₂/0₂ (d) O₂/CO₂

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