11th Class Biology Chapter 11 MCQs with Answers

11th Class Biology Chapter 11 MCQs with Answers: In the 11th class biology curriculum, the chapter on “Bioenergetics” focuses on the study of energy flow and the biochemical processes that occur in living organisms. It explores how organisms obtain, store, and utilize energy for their metabolic activities.

11th Class Biology Chapter 01 MCQs with Answers

Here are some key points you may cover in this chapter:

1. Introduction to Bioenergetics: Bioenergetics is the study of energy flow and transformation in living organisms. It involves understanding the processes by which organisms obtain energy, convert it into usable forms, and utilize it for various cellular activities.
2. Energy and its Forms: Energy is the capacity to do work or cause a change. It exists in different forms, including kinetic energy (energy of motion) and potential energy (stored energy). In biological systems, energy is primarily stored in the chemical bonds of organic molecules.
3. Laws of Thermodynamics: The laws of thermodynamics govern energy transformations. They provide fundamental principles for understanding bioenergetics:

• First Law of Thermodynamics (Law of Conservation of Energy): Energy cannot be created or destroyed but can only be converted from one form to another.
• Second Law of Thermodynamics: The entropy (disorder) of a system tends to increase over time. In energy transformations, some energy is lost as heat, reducing the overall efficiency of the system.

4. Energy Conversion in Cells: Cells convert energy from one form to another to drive their metabolic processes. The main energy currency in cells is adenosine triphosphate (ATP). ATP is synthesized through cellular respiration, capturing energy from the breakdown of organic molecules.
5. Cellular Respiration: Cellular respiration is the process by which cells harvest energy from organic molecules and convert it into ATP. It involves three main stages: glycolysis, the Krebs cycle (also known as the citric acid cycle or TCA cycle), and oxidative phosphorylation (electron transport chain and chemiosmosis).
6. Photosynthesis: Photosynthesis is the process by which green plants, algae, and some bacteria convert light energy into chemical energy (glucose). It takes place in the chloroplasts and involves two main stages: light-dependent reactions and light-independent reactions (Calvin cycle).
7. Metabolic Pathways: Bioenergetics involves various metabolic pathways in cells. These pathways, such as glycolysis, the Krebs cycle, and the Calvin cycle, are interconnected and regulate the flow of energy and the synthesis and breakdown of organic molecules.
8. Energy Balance and Homeostasis: Organisms must maintain energy balance and homeostasis to ensure proper functioning. This involves balancing energy intake and expenditure, regulating metabolic processes, and adapting to changing environmental conditions.

Understanding bioenergetics provides insights into how organisms obtain and utilize energy to carry out their vital functions. It highlights the interplay between energy transformations, metabolic pathways, and the overall efficiency of biological systems.

11th Class Biology Chapter 01 MCQs: Bioenergetic

1. The quantitative study of energy relationship in the biological system is called choose one:

1. Biochemistry
2. Biotechnology
3. Bioenergetics
4. Biophysics

2. Which of the following processes is not oxidation reduction reaction?

1. Photosynthesis
2. Respiration
3. Photorespiration
4. None of above

3. The compensation point comes in the choose one:

1. Morning
2. Evening
3. Dawn
4. Night

4. The biologist who gave the hypothesis that plant spilt water and release water was choose one:

1. Calvin
2. Krebs
3. Van Neil
4. Dixon

5. Which of the following is electron acceptor during light reaction of photosynthesis?

1. NAD
2. FAD
3. NADP
4. NADPH

6. Chlorophyll is present in choose one:

1. Stroma
2. Thylakoids
3. Granum
4. Intergranum

7. Which of the followings is not the wavelength of visible light?

1. 280 nm
2. 380 nm
3. 180 nm
4. 580 nm

8. Which of the followings is not the wavelength of visible light?

1. Carotenoids
2. Carotenes
3. Xanthophylls
4. None of the above

9. Which of the following chlorophylls is present in bacteria?

1. a
2. b
3. c
4. None of the above

10. Which of the following wavelengths is least absorbed by the chlorphyull?

1. Red
2. Blue
3. Green
4. Orange

11. Match haem group of haemoglobin with one of the following choose one:

1. Chlorophyll
2. Chloroplast
3. Porphyrin ring
4. Pyrrole

12. Which of the followings is the smallest unit?

1. Chlorophyll
2. Phytol
3. Porphyrin ring
4. Pyrrole

13. Which of the followings is tail of the chlorophyll molecule b?

1. Chlorophyll
2. Phytol
3. Porphyrin ring
4. Pyrrole

14. How many atoms of oxygen are present in chlorophyll b?

1. 2
2. 4
3. 6
4. 8

15. Which of the followings is not the accessory pigment?

1. Chlorophyll a
2. Chlorophyll b
3. Carotene
4. Xanthophylls

16. First action spectrum was obtained by choose one:

1. Calvin
2. Krebs
3. Van Neil
4. Engelmann

17. The percentage of photosynthesis in land plants is choose one:

1. 5%
2. 10%
3. 15%
4. 20%

18. The reduction of which of the following molecules takes place during photosynthesis?

1. Water
2. Carbon dioxide
3. Glucose
4. Oxygen

19. The oxidation of which of the following molecules takes place during photosynthesis?

1. Water
2. Carbon dioxide
3. Glucose
4. Oxygen

20. Which of the following components of the photo system has chlorophyll b molecules?

1. Antenna complex
2. Reaction center
3. Primary electron acceptor
4. ETC

21. Photosystem I absorbs which of the following lights?

1. 600 nm
2. 680 nm
3. 700 nm
4. 720 nm

22. Photosystem Il absorbs which of the following lights?

1. 600 nm
2. 680 nm
3. 700
4. 720 nm

23. The splitting of water and release of oxygen during light reaction is called choose one:

1. Hydrolysis
2. Photolysis
3. Oxidation
4. Reduction

24. The synthesis of ATP during light reaction is called choose one:

1. Oxidative phosphorylation
2. Photophosphorylation
3. Substrate phosphorylation
4. None of the above

25. Which of the following electron acceptors is absent during cyclic phosphorylation?

1. Cytochromes
2. Ferredoxin
3. NADP
4. PC

26. Which of the following mechanism is involved in the synthesis of ATP?

1. Reduction
2. Oxidation
3. Chemiosmosis
4. None of above

27. Which of the followings is irrelevant?

1. Calvin cycle
2. Dark reaction
3. Light reaction
4. C3 pathway

28. Match rubisco with one of the followings choose one:

1. RUBP
2. RBP
3. RUBP carboxylase
4. RUBP reductase

29. Which of the following is the end product of calvin cycle?

1. Glucose
2. PGA
3. G3P
4. Strach

30. The G3P molecules formed during Calvin cycle are choose one:

1. 3
2. 4
3. 5
4. 6

31. The carbon dioxide acceptor during dark reaction is choose one:

1. Glucose
2. RuBP
3. PGA
4. Rubisco

32. Which of the following compounds is formed during anaerobic reaction?

1. Pyruvic acid
2. Lactic acid
3. Ethyl alcohol
4. None of above

33. Which of the following compounds is formed during aerobic reaction?

1. Pyruvic acid
2. Lactic acid
3. Ethyl alcohol
4. None of above

34. How much Glucose is converted into ATP during anaerobic reaction?

1. 1%
2. 2%
3. 3%
4. 4%

35. A molecule of ATP releases energy choose one:

1. 6.3 Kcal
2. 7.3 Kcal
3. 8.3 Kcal
4. 9.3 Kcal

36. The removal of hydrogen is controlled by an enzyme called choose one:

1. Hydrogenase
2. Dehydrogenases
3. Oxidase
4. Reductase

37. Pyruvic acid is produced as a result of choose one:

1. Glycolysis
2. Krebs cycle
3. Respiratory chain
4. Phosphorylation

38. Which of the followings is the end product of oxidative phase of glycolysis?

1. F-6-P
2. DAP
3. G-6-P
4. PGAL

39. Which of the following compounds is produced during pyruvic acid oxidation?

1. DAP
2. PAGL
3. Acetate
4. Acetyl COA

40. The acetyl COA unites with which of following molecule during Krebs cycle?

1. Citrate
2. Oxaloacetate
3. Keto – glutrae
4. Fumrate

41. The oxidation of which of the following molecules produce FADH₂ during Krebs cycle?

1. Succinate
2. Fumrate
3. Malate
4. Ketoglutrate

42. The oxidation of which of the following molecule produce oxalocatate during krebs cycle.

1. Succinate
2. Fumrate
3. Malate
4. Ketoglutrate

43. Krebs cycle takes place in choose one:

1. Cytosol
2. Matrix of mitochondria
3. Inner membrane
4. Outer membrane of mitochondria

44. Respiratory chain is present in choose one:

1. Cytosol
2. Matrix of mitochondria
3. Inner membrane
4. Outer membrane of mitochondria

45. During respiratory chain, coenzyme Q is reduced by choose one:

1. Cytochrome a
2. Cytochrome b
3. Cytochrome c
4. Cytochrome a₃

46. Which of the following electron acceptors is oxidized by an atom of oxygen?

1. Cytochrome a
2. Cytochrome b
3. Cytochrome c
4. Cytochrome a₃

47. The number of ATPs produced during transfer of electron from NADH to oxygen is choose one:

1. 1
2. 2
3. 3
4. 4

48. The energy capturing process is choose one:

1. Photosynthesis
2. Respiration
3. Metabolism
4. Bioenergetics

49. The energy releasing process is choose one:

1. Photosynthesis
2. Respiration
3. Metabolsim
4. Bioenergetics

50. The biological energy transformation is called choose one:

1. Photosynthesis
2. Respiration
3. Metabolsim
4. Bioenergetics

51. Which of the followings is not reactant in photosynthesis?

1. CO₂
2. Water
3. Light
4. Oxygen

52. Which of the following is the most important factor for photosynthesis?

1. CO₂
2. Water
3. Light
4. Oxygen

53. The difference between photosynthesis and respiration is choose one:

1. Photosynthesis occurs at day time while respiration take place at night
2. Photosynthesis and respiration both occurs at daytime
3. Photosynthesis occurs at day while respiration occur day and night
4. None of the above

54. The compensation point is a point when choose one:

1. Intake of oxygen but not carbon dioxide
2. Intake of carbon dioxide but not oxygen
3. Intake of both oxygen and carbon dioxide
4. None of the gases is taken inside

55. When does the rate of photosynthesis and respiration become equal?

1. During day time
2. During night
3. At dawn
4. In the morning

56. The source of oxygen during photosynthesis is choose one:

1. Carbon dioxide
2. Water
3. Glucose
4. Light

57. During the isotope tracer technique one group of plants was given H₂O containing O₁₈ with CO₂ containing common oxygen O₁₆. The oxygen released during photosynthesis would be choose one:

1. Radioactive
2. Not radioactive
3. Some amount radioactive some none-radioactive
4. None of the above

58. During the isotope tracer technique second group of plant was given H₂O containing common oxygen with CO₂ containing O₁₈. The oxygen released during photosynthesis would be choose one:

1. Radioactive
2. Not radioactive
3. Some amount radioactive some non-radioactive
4. None of the above

59. A reducing agent is that compound which choose one:

1. Can remove electron from another compound
2. Can add electron into anther electron
3. Can absorb electron form another compound
4. None of the above

60. The NADPH₂ has choose one:

1. Oxidizing power
2. Reducing power
3. Redox power
4. None of above

61. Most of the photosynthetic enzymes are present in choose one:

1. Stroma of chloroplast
2. Thylakoids of chloroplast
3. Granum of chloroplast
4. Chlorophyll

62. Chlorophylls are present in the choose one:

1. Stroma of chloroplast
2. Thylakoids of chloroplast
3. Granum of chloroplast
4. Intergranum

63. Chemiosmosis during photosynthesis takes place in choose one:

1. Stroma of chloroplast
2. Thylakoid membranes of chloroplast
3. Granum of chloroplast
4. Intergranum

64. In prokaryotes chlorophylls is present in the choose one:

1. Stroma of chloroplast
2. Thylakoid membranes of chloroplast
3. Granum of Chloroplast
4. Photosynthetic membranes

65. They pigment with red colour is choose one:

1. Carotenoids
2. Carotenes
3. Xanthophylls
4. Chlorophyll

66. The pigment with yellow colour is choose one:

1. Carotenoids
2. Carotenes
3. Xanthophylls
4. Chlorophyll

67. which of the following wavelengths is least absorb by chlorophyll?

1. Red
2. Green
3. Yellow
4. Blue

68. Which of the followings is maximum absorbed by chlorophyll?

1. Red
2. Green
3. Yellow
4. Blue

69. The plants appear green because choose one:

1. They absorb green light
2. They do not absorb green light
3. The chlorophyll has originally green colour
4. None of the above

70. The leaves of the plants become yellow due to deficiency of choose one:

1. Magnesium
2. Iron
3. Sodium
4. Potassium

71. Which of the followings take part directly in the photosynthetic reactions?

1. Chlorophyll a
2. Chlorophyll b
3. Chlorophyll c
4. Chlorophyll d

72. Which of the followings in not an accessory pigment?

1. Chlorophyll a
2. Chlorophyll b
3. Carotenes
4. Xanthophylls

73. The absorption spectrum of light is maximum in the wavelength of choose one:

1. 430 and 670 nm
2. 330 and 660 nm
3. 430 and 690 nm
4. 550 and 580 nm

74. The peaks of the action spectrum of photosynthesis are comparatively broader than the absorption spectrum of chlorophylls due to choose one:

1. Chlorophyll a
2. Chlorophyll b
3. Accessory pigment
4. None of the above

75. The photosynthesis carried out by the terrestrial plants is choose one:

1. 5% of the total photosynthesis
2. 10% of the total photosynthesis
3. 15% of the total photosynthesis
4. 20 % of the tott 1

76. The photosynthesis carried out by the aquatic plants is choose one:

1. 70% of the total photosynthesis
2. 80% of the total photosynthesis
3. 90% of the total photosynthesis
4. None of the above

77. Air contains carbon dioxide about choose one:

1. 0.03 to 0.04%
2. 0.02 to 0.03%
3. 0.03 to 0.05%
4. None of above

78. CO₂ is converted into sugar. This CO₂ is choose one:

1. Reduced
2. Oxidized
3. Both (A) and (B)
4. None of above

79. ATP is synthesized during chemiosmosis in choose one:

1. Antenna complex
2. Reaction centre
3. Primary electron acceptor
4. Electron transport chain

80. Cyclic phosphorylation starts when choose one:

1. There is less amount of glucose
2. There is less amount of NADH
3. There is less amount of ATP
4. None of the above

81. Which of the following processes does not take place during chemiosmosis?

1. Synthesis of NADH
2. Movement of H* through electron transport chain
3. Synthesis of ATP
4. Movement of through ATP

82. Rubisco is choose one:

1. Compound used during dark reaction
2. It is an electron acceptor
3. A coenzyme
4. An enzyme

83. Which of the followings is common in aerobic anaerobic respiration?

1. Glycolysis
2. Krebs cycle
3. Electron transport chain
4. Pyruvic acid oxidation

84. Which of the following reactions does not take place in animals?

1. Glycolysis
2. Lactic acid fermentation
3. Alcoholic fermentation
4. Krebs cycle

85. Which of the following reactions take place during fatigue in the muscle of man?

1. Glycolysis
2. Lactic acid fermentation
3. Alcoholic fermentation
4. Krebs cycle

86. In which reaction free energy is not required?

1. Respiration
2. Photosynthesis
3. Fermentation
4. None of above

87. Which of the following processes takes place in the presence and absence of oxygen?

1. Glycolysis
2. Lactic acid fermentation
3. Alcoholic fermentation
4. Krebs cycle

88. Which of the following reaction is included in the oxidative phase of glycolysis?

1. Glucose +ATP
2. Fructose +ATP
3. PAGL 6NAD
4. None of above

89. How many net ATPs are produced during glycolysis?

1. 2
2. 3
3. 4
4. 5

90. During oxidation of which electron acceptor, ATP is not produced choose one:

1. Coenzyme Q
2. Cytochrome b
3. Cytochrome c
4. Cytochrome a and a₃

91. Co-enzyme Q is in turn oxidized by cytochrome choose one:

1. a₃
2. a
3. b
4. a

92. Glycolysis is the break down of choose one:

1. Maltose
2. Lactose
3. Fructose
4. Glucose

93. The power house of the cell is choose one:

1. Ribosome
2. Mitochondria
3. SER
4. RER

94. Carbon fixation refers to the initial incorporation of choose one:

1. Oxygen
2. Hydrogen
3. CO₂
4. Carbon

95. The mechanism for ATP synthesis is choose one:

1. Phosphorylation
2. Photosynthesis
3. Chemosmosis
4. Chemosynthesis

96. Carbon dioxide enters the leaves through choose one:

1. Stroma
2. Cuticle
3. Guard cells
4. Stomata

97. Haeme portion of haemoglobin contains choose one:

1. Carbon atom
2. Iron atom
3. Phosphorous atom
4. Magnesium atom

98. Chlorophyll absorbs light energy, which is converted into chemical energy of choose one:

1. ATP
2. ATP & NADPH
3. NADPH
4. None

99. Chlorophyll b is found alongwith chlorophyll a in all green plants and choose one:

1. Golden algae
2. Blue green algae
3. Algae
4. Green algae

100. Pyruvic acid is the end product of choose one:

1. None
2. Electron transport chain
3. Glycolysis
4. Krebs cycle

101. Stroma is fluid in the chloroplast which surrounds the choose one:

1. Thylakoids
2. Grana
3. Matrix
4. Envelop

102. Which is a kind of chemical link between catabolism and anabolism?

1. Double
2. ATP
3. CO₂
4. Grana

103. Van Niel hypothesized that plants split water as a source of choose one:

1. Oxygen
2. ATP
3. Hydrogen
4. Both A and C

104. Choroplast has membrane envelop.

1. No
2. single
3. Hydrogen
4. Double

105. Thylakoid sacs are stacked in columns called choose one:

1. Double
2. CO₂
3. Grana
4. ATP