NEET Biology Chapter Wise Mock Test – Respiration in Plants
1. Respiration in plants
(a) results in the formation of fats
(b) produces 02 and water
(c) is characteristic feature of all livinguelts
(d) occurs only during night
2. Respiration is regarded as
(a) catabolic process
(b) reduction process
(c) anabolic process
(d) synthetic process
3. Respiration is accompanied by
(a) decrease in weight
(b) increase in weight
(c) weight remains constant
(d) decrease in size
4. Consider the following statements and choose the incorrect options.
I. The mechanism of breakdown of food material within the cell to release energy is called cellular respiration.
II. Respiration causes the breaking of C-C bond of complex compounds through oxidation within the ceils, leading release of energy.
III. The compounds that are oxidised during this process
are known as oxidatory substrate.
(a) Only I (b) Only II
(c) Only III (d) None of these
5. Read the following statements and choose the incorrect statements.
Plants do not have respiratory organs because.
I. Each plant part takes care of its own gas exchange needs.
II. There is very little transport of gases from one plant part to another.
III. Only during photosynthesis large volume of gaseous exchange occurs.
(a) Only I (b) Only II
(c) Only III (d) Only IV
6. Floating respiration is respiration
(a) occurring in cytoplasm
(b) using carbohydrates as substrate
(c) using fats as respiratory substrate
(d) Both (b) and (c)
7. The complete combustion of glucose in respiration is represented by
(a) C6H1206 + 602 —>+6C02 + 6H20+ Energy
(b) C6H1206+ 6C02 —>+ 602+ 6H20 + Energy
(c) C6H1206 + 602 + 6 C02—>+ 6C02 + 6H20+ Energy
(d) C6H1206 + 602 + 6C02 +ATP —> 6C02 + 6H20
8. Respiratory substrate are the organic substance which are during respiration to liberate energy.
(a) oxidised
(b) reduced
(c) Both (a) and (b)
(d) synthesised
9. The released energy obtained by oxidation is stored as
(a) a concentration gradient across a membrane
(b) ADP
(c) ATP
(d) NAD+
10. The intermediate compound common for aerobic and anaerobic respiration is
(a) citric acid
(b) pyruvic acid
(c) acetyl Co-A
(d) succinic acid
11. Incomplete breakdown of sugar in anaerobic respiration forms
(a) glucose and carbon dioxide
(b) alcohol and carbon dioxide
(c) water and carbon dioxide
(d) fructose and water
12. Cyanide resistant pathway is one in which
(a) cyanide breakdown respiratory membrane
(b) electron transfer directly from complex I to IV
(c) electron transfer directly from complex II to oxygen
(d) None of the above
13. The most common example, which can respire in the absence of oxygen is
(a) potato
(b) Hydrilla
(c) yeast
(d) onion
14. The energy releasing metabolic process in which substrate is oxidised without an external acceptor is called
(a) glycolysis
(b) fermentation
(c) aerobic respiration
(d) photorespiration
15. Incomplete breakdown of sugar in anaerobic respiration results in the formation of
(a) fructose and water
(b) glucose and 02
(c) alcohol and C02
(d) water and 02
16. Which one of the following mammalian cells is not capable of metabolising glucose to carbon dioxide aerobically?
(a) White blood cells
(b) Unstriated muscle cells
(c) Liver cells
(d) Red blood cells
17. What will happen if fermentation is allowed to proceed in a closed vessel?
(a) Vacuum will result
(b) No change will be there
(c) Pressure will develop because of excessive C02
(d) Pressure will develop because of excessive 02
18. Dough kept over-night in warm weather becomes soft and spongy because of
(a) absorption of carbon dioxide from atmosphere
(b) fermentation
(c) cohesion
(d) osmosis
19. Choose the correct combination of labelling the molecules involved in the pathway of anaerobic respiration in yeast.
(a) A-Ethanol, B-C02, C-Acetaldehyde
(b) A—C02, B-Ethanol, C-Acetaldehyde
(c) A-Acetaldehyde, B-C02, C-Ethanol
(d) A-Ethanol, B-Acetaldehyde, C- C02
20. Alcoholic fermentation takes place in the presence of
(a) maltase
(b) zymase
(c) amylase
(d) invertase
21. Fermentation is
(a) anaerobic respiration
(b) process which only occurs in in vitro condition
(c) complete oxidation of carbohydrate
(d) None of the above
22. Which of the following statements regarding respiration and breathing is correct?
(a) They are the same
(b) Plant respire, while animals breathe
(c) Higher animals breathe as well as respire
(d) Higher plants respire during the day but breathe at night
23. The common phase between anaerobic and aerobic respiration is called
(a) TCA cycle (b) oxidative phosphorylation
(c) Krebs’ cycle (d) glycolysis
24. The net gain of ATP molecules in glycolysis is
(a) 0 (b) 2
(c) 4 (d) 8
25. Phosphorylation of glucose during glycolysis is catalysed by
(a) phosphoglucomutase
(b) phosphoglucoisomerase
(c) hexokinase
(d) phosphorylase
26. Pyruvic acid, the key product of glycolysis can have many metabolic fates. Under aerobic condition it forms
(a) lactic acid
(b) C02 + H20
(c) acetyl Co – A+ C02
(d) ethanol + C02
27. The number of 02 molecules required for glycolytic breakdown of one glucose molecule is
(a) zero
(b)two
(c) three
(d) four
28. In glycolysis, during oxidation electrons are removed by
(a) ATP
(b) glyceraldehyde-3-phosphate
(c) NAD+
(d) molecular oxygen
29. Which of the following connects the glycolysis and Krebs’ cycle?
(a) Pyruvic acid
(b) Glucose
(c) Acetyl Co-A
(d) ATP
30. Which of the following is synthesised during substrate phosphorylation?
(a) AMP
(b) ATP
(c) NADH
(d) FMN
31. The enzyme, which converts glucose to glucose-6-phosphate is
(a) hexokinase
(b) glucose synthetase
(c) glucose-6-phosphate
(d) None of these
32. Which of the following statements is wrong for glycolysis?
(a) It uses ATP
(b) It produces ATP
(c) End products are C02 and water
(d) NADH is produced
33. Phosphorylation of glucose with the help of ATP and hexokinase produces
(a) glucose-1-phosphate
(b) glucose-6-phosphate
(c) glucose-1,6-diphosphate
(d) fructose-1,6-diphosphate
34. As compared to anaerobic respiration, the energy released during aerobic respiration is
(a) 8 times
(b) 10 times
(c) 18 times
(d) 24 times
35. C02 is released in aerobic respiration in how many steps?
(a) One
(b) Six
(c) Three
(d) Four
36. Group of plants similar to animals in their requirement of 02 for cellular respiration belongs to
(a) fungi
(b) lichens
(c) blue-green algae
(d) red algae
37. Pyruvic acid before combining with oxaloacetic acid of TCA cycle changes into
(a) acetyl Co-A
(b) lactic acid
(c) acetic acid
(d) aconitic acid
38. Removal of hydrogen and C02 from a substrate is called
(a) decarboxylation
(b) oxidation
(c) oxidative decarboxylation
(d) reductive decarboxylation
39. Metabolic water is the one
(a) used during transamination
(b) used during photosynthesis
(c) produced during aerobic utilisation of glucose
(d) produced during condensation or polymerisation
40. Site of Krebs’ cycle in mitochondria is
(a) outer membrane
(b) mitochondrial matrix
(c) oxysomes
(d) None of these
41. 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 enzymes is
(a) lactate dehydrogenase
(b) isocitrate dehydrogenase
(c) malate dehydrogenase
(d) succinate dehydrogenase
42. Succinate is oxidised to fumarate in Krebs’ cycle by
(a) removal of hydrogen
(b) loss of electrons
(c) addition of oxygen
(d) removal of oxygen
43. A single cycle of TCA cycle yields
(a) 2 FADH2 + 2NADH2 + 2ATP
(b) 1FADH2 + 2NADH2 +1ATP
(c) 1FADH2 + 3NADH2 + 1ATP
(d) 1FADH2 + 1NADH2 + 1ATP
44. Match the following columns.
A B C D A B C D
(a) 2 5 3 1 (b) 3 1 4 2
(c) 5 1 4 2 (d) 5 3 1 2
45. FAD acts as an electron acceptor in between
(a) fumaric acid and malic acid
(b) succinic and fumaric acid
(c) malic and oxaloacetic acid
(d) citric acid and isocitric acid
46. The process of formation of ATP in respiration is called
(a) photophosphorylation
(b) substrate phosphorylation
(c) oxidative phosphorylation
(d) phosphorylation
47. What would happen if NADH2 is oxidised to form water in a single step?
(a) Production of 3 ATP
(b) Mostly wastage of energy
(c) Production of 12 ATP
(d) None of the above
48. Electron Transport System (ETS) is located in mitochondrial
(a) outer membrane
(b) inner membrane space
(c) inner membrane
(d) matrix
49. During which stage in the complete oxidation of glucose are the greatest number of ATP molecules formed from ADP?
(a) Conversion of pyruvic acid to acetyl Co-A
(b) Electron transport chain
(c) Glycolysis
(d) Krebs’ cycle
50. Mitochondria are called powerhouses of the cell. Which of the following observations support this Statement?
(a) Mitochondria have a double membrane
(b) The enzymes of the Krebs’ cycle and the cytochromes are found in mitochondria
(c) Mitochondria synthesis ATP
(d) Mitochondria are found in almost all plants and animal cells
51. The end product of oxidative phosphorylation is
(a) NADH
(b) oxygen
(c) ADP
(d) ATP+ H20
52. The ultimate electron acceptor of respiration in an aerobic organism is
(a) cytochrome
(b) oxygen
(c) hydrogen
(d) glucose
53. Read the following statements and select the wrong statements.
I. When tripalmitin is used as a substrate in respiration the RQ is 0.
II. The intermediate compound which links glycolysis with Krebs’ cycle is malic acid.
III. One glucose molecule yields a net gain of 36 ATP molecule during aerobic respiration.
IV. One glucose molecule yields a net gain of 2 ATP molecules during fermentation.
V. The scheme of glycolysis was given by Krebs.
(a) I, II and III (b) II, III and V
(c) I, II and V (d) II and IV
54. Match the following columns.
Codes
ABC ABC
(a) 1 3 2 (b) 2 1 3
(c) 2 3 1 (d) 3 1 2
55. The diagram given below shows the representation of ATP synthesis in mitochondria. Fill in the blanks with appropriate options.
(a) A-ATP, B-F,, C-Pi, D-2H+, E-Inner mitochondrial
membrane .
(b) A-ATP, B-Inner mitochondrial membrane, C—F,,
D-Pi, E-2H+
(c) A-P,0, B-ATP, C-Pi, D-Inner mitochondrial membrane
E-2H+ ‘
(d) A-Pi, B-F^ C-Inner mitochondrial membrane,
D-ATP, E-2H+
56. Match the following columns.
Codes
A B C D A B C D
(a) 2 4 1 3 (b) 1 -3 2 4
(c) 3 1 2 4 (d) 4 3 1 2
57.The electron acceptors in ETS are arranged
according to
(a) decreasing positive potential
(b) increasing positive potential
(c) increasing negative potential
(d) None of the above
58. Which among the following is the final electron acceptor?
(a) OAA
(b) NADP
(c) Cytochrome oxidase
(d) Pyruvate
59. In pentose phosphate shunt, the number of NADPH2
formed per glucose molecule is
(a) 12
(b) 6
(c) 2
(d) 10
60. Pentose phosphate pathway was discovered by
(a) Calvin
(b) Warburg and Dickens
(c) Hill
(d) Embden
61. EMP pathway can generate a total of
(a) 6 ATP
(b) 8 ATP
(c) 24 ATP
(d) 38 ATP
62. Which of the following is an amphibolic pathway?
(a) TCA cycle
(b) Calvin cycle
(c) Terminal oxidation
(d) ETC
63. During complete metabolism of glucose, the number of ATP formed from ADP and inorganic phosphate is
(a) 2 ATP
(b) 12 ATP
(c) 36 ATP
(d) 44 ATP
64. How many ATP molecules could maximally be generated from one molecule of glucose, if the complete oxidation of one mole of glucose to C02 and H20 yields 686 kcal and the useful chemical energy available in the high energy phosphate bond of one mole of ATP is 12 kcal?
(a) 2
(b) 30
(c) 57
(d) 1
65. If volume of C02 liberated during respiration is more than the volume of 02 used then respiratory substrate will be
(a) carbohydrate
(b) fat
(c) protein
(d) organic acid
66. RQ in anaerobic respiration is
(a) 0.7
(b) 0.9
(c) unity
(d) infinity
67. Which one of the following has the highest RQ?
(a) Malic acid
(b) Protein
(c) Fat
(d) Starch
68. In succulents, respiratory quotient is always less than one due to
(a) incomplete oxidation
(b) incomplete reduction
(c) complete reduction
(d) None of these
69. In an organism utilising sugars as its source of energy anaerobically, the RQ is likely
(a) 0.7
(b) 0.9
(c) 1.0
(d) infinity
70. Respiratory Quotient (RQ) is one in case of
(a) fatty acids
(b) nucleic acids
(c) carbohydrate
(d) organic acids
71. If RQ is less than 1.0 in a respiratory metabolism, it would mean that
(a) carbohydrates are used as respiratory substrate
(b) organic acids are used as respiratory substrate
(c) the oxidation of the respiratory substrate consumed more oxygen than the amount of C02 released
(d) the oxidation of respiratory substrate consumed less oxygen than the amount of C02 released
(e) the reaction is anaerobic
72. The rate of respiration in the presence of cyanides, azides and carbon mono oxides will
(a) increase
(b) decrease
(c) remain the same
(d) None of these
73. Following diagram shows the demonstration of aerobic respiration.
What result can be drawn from it?
(a) The experiment shows that C02 is evolved in an aerobic respiration of seeds
(b) It shows that 02 is evolved in an aerobic respiration of seed
(c) Aerobic respiration takes place in the seed in the absence of free oxygen
(d) The potassium hydroxide forms 02 and water
74. The universal hydrogen acceptor is
(a) NAD
(b) ATP
(c) Co-A
(d) TPP
75. Substrate used in protoplasmic respiration, is
(a) carbohydrate
(b) proteins
(c) fats and oils
(d) organic acids
76. The overall goal of glycolysis, Krebs’ cycle and the electron transport system is the formation of
(a) ATP in small stepwise units
(b) ATP in one large oxidation reaction
(c) sugars
(d) nucleic acids
77. Match the following columns.
Codes
ABC D A B
(a) 1 2 3 4 (b) 5 4
(c) 4 5 1 2 (d) 1 5
78. Match the following columns.
Codes
ABCD ABCD
(a) 4 5 2 – 3 (b) 4 5 3 1
(c) 1 5 4 2 (d) 2 3 4 5
79. Dry seeds can tolerate higher temperature than the germinating seeds due to the reason that
(a) dry seeds have more reserved food
(b) hydration makes the enzymes more sensitive to temperature
(c) seeds are meant for perennation
(d) None of the above
80. The respiration in germinating seeds produces energy, which can be detected in the form of
(a) water
(b) heat
(c) oxygen
(d) C02
81. Respiration is different from combustion that is the
(a) energy from carbohydrates is released in one step
(b) energy from carbohydrates is released in different steps
(c) efficiency is very low
(d) All of the above
82. When bond between first and second phosphate of ATP is hydrolysed, the amount of energy released (at pH 7) is
(a) 1200 cal
(b) 3000 cal
(c) 1500-1800 cal
(d) 6.5 kcal
83. Chemiosmotic theory of ATP synthesis in the chloroplasts and mitochondria is based on
(a) proton gradient
(b) accumulation of K+ ions
(c) accumulation of Na ions
(d) membrane potential
Direction (Q. Nos. 84-90) In each of the following questions a statement of Assertion is given followed by a corresponding statement of Reason just below it. Of the statements, mark the correct answer as
(a) If both Assertion and Reason are true and Reason is the
correct explanation of Assertion. ‘
(b) If both Assertion and Reason are true, but the Reason is
not the correct explanation of Assertion.
(c) If Assertion is true, but Reason is false.
(d) If both Assertion and Reason are false
84. Assertion ATP is the energy carrier of cell.
Reason AMP is a nucleotide.
85. Assertion Under conditions of high light intensity and limited C02 supply, photorespiration has a useful role in protecting the plants from photo-oxidative damage.
Reason If enough C02 is not available to utilise light energy for carboxylation to ‘processed, the excess energy may not cause damage to plants.
86. Assertion Clostridium tetani is an obligate anaerobe.
Reason They cannot live in high concentration of oxygen.
87. Assertion Respiratory pathway is an amphibolic pathway.
Reason The respiratory pathway is involved in both anabolism and catabolism.
88. Assertion Respiratory quotient depends upon the respiratory substrate used during respiration.
Reason RQ of carbohydrates is 1.
89. Assertion 36 ATP molecules are formed from one molecule of glucose in muscles and nerve cells.
Reason Aerobic respiration in prokaryotes, heart, liver and kidneys produced 38 ATP molecules per glucose molecules.
90. Assertion In electron transport chain, there is a gain of energy at each step.
Reason At each step of ETC, there are electron carries.
91. Which structures perform the functions of mitochondria in bacteria?
(a) Nucleoid
(b) Ribosomes
(c) Cell wall
(d) Mesosomes
92. The three boxes in this diagram represents the three major biosyn the pathways in aerobic respiration and arrows represent net reacts or products
(a) ATP
(b) H20
(c) FAD+ or FADH2
(d) NADH
93. Which of the metabolites is common to respiration mediated breakdown of fats, carbohydrates and proteins?
(a) Fructose-1,6-bisphosphate
(b) Pyruvic acid
(c) Acetyl Co-A
(d) Glucose-6-phosphate
94. The energy-released metabolic process in which substrate is oxidized without an external electron acceptor, is called
(a) glycolysis
(b) fermentation
(c) aerobic respiration
(d) photorespiration
Answers :
