MCQOPTIONS
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MCQOPTIONS
This section includes 134 Mcqs, each offering curated multiple-choice questions to sharpen your Life Sciences knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
When the decomposers respire, |
| A. | carbon dioxide is produced |
| B. | carbon dioxide is reduced |
| C. | carbon monoxide is produced |
| D. | carbon monoxide is reduced |
| Answer» B. carbon dioxide is reduced | |
| 52. |
Study of energy relationships and energy conversions in biological systems is termed as |
| A. | microbiology |
| B. | biotechnology |
| C. | bioenergetics |
| D. | biophysics |
| Answer» D. biophysics | |
| 53. |
When there is no exchange between leaves and atmosphere due to balance of respiration and photosynthesis, this condition is known as |
| A. | balanced point |
| B. | unbalanced point |
| C. | redemption point |
| D. | compensation point |
| Answer» E. | |
| 54. |
Glycolysis mean splitting of |
| A. | nitrogen |
| B. | oxygen |
| C. | sugar |
| D. | protein |
| Answer» D. protein | |
| 55. |
Chloroplast is present inside leaf within tissue called |
| A. | palisade mesophyll |
| B. | microphyll |
| C. | epidermis |
| D. | spongy mesophyll |
| Answer» B. microphyll | |
| 56. |
Instrument which helps to measure ability of pigment to absorb light is called |
| A. | thermometer |
| B. | spectrophotometer |
| C. | hydrometer |
| D. | ceilometers |
| Answer» C. hydrometer | |
| 57. |
Carbon dioxide (CO₂) is one of the end products of decomposition and its nature is |
| A. | organic |
| B. | inorganic |
| C. | artificial |
| D. | replicatic |
| Answer» C. artificial | |
| 58. |
Specialized molecule which traps high energy electron and electron carriers is |
| A. | primary acceptor |
| B. | electron acceptor |
| C. | primary electron acceptor |
| D. | electron acceptor |
| Answer» D. electron acceptor | |
| 59. |
After decomposition of household sewage, the dried substance results in |
| A. | sludge |
| B. | fertilizer |
| C. | land fill |
| D. | all of above |
| Answer» E. | |
| 60. |
Chlorophyll (a) has ability to absorb wave length of light |
| A. | blue-red |
| B. | blue-green |
| C. | yellow green |
| D. | yellow blue |
| Answer» C. yellow green | |
| 61. |
Before discharging decomposed sewage into rivers and seas, the |
| A. | water is filtered only |
| B. | pathogens are removed only |
| C. | pH of sewage is neutralized |
| D. | water is filtered and pathogens are removed |
| Answer» E. | |
| 62. |
Light energy is absorbed by pigment molecules present on |
| A. | Antenna pigment |
| B. | Antenna complex |
| C. | Photo system |
| D. | Cuticle |
| Answer» C. Photo system | |
| 63. |
During dark reactions, energy is stored in molecules of |
| A. | carbon |
| B. | oxygen |
| C. | sugar |
| D. | hydrogen |
| Answer» D. hydrogen | |
| 64. |
Chlorophyll (b) facilitate chlorophyll a by passing absorbed |
| A. | heat energy |
| B. | light energy |
| C. | light |
| D. | heat |
| Answer» D. heat | |
| 65. |
Enzyme which catalyze reaction of Calvin cycle is known as |
| A. | phosphatase |
| B. | catalase |
| C. | rubisco |
| D. | amylase |
| Answer» D. amylase | |
| 66. |
Leaves are major sites for presence of |
| A. | lamina |
| B. | branches |
| C. | chloroplast |
| D. | centriole |
| Answer» D. centriole | |
| 67. |
Chlorophyll which is found in photosynthetic bacteria is known as |
| A. | bacteriphylls |
| B. | bacteriochlorophylls |
| C. | bacteriophtosynthetic |
| D. | bacteriophage |
| Answer» C. bacteriophtosynthetic | |
| 68. |
Thylakoid membrane produces ATP by process of |
| A. | photosynthesis |
| B. | chemiosmosis |
| C. | chemosynthesis |
| D. | respiration |
| Answer» C. chemosynthesis | |
| 69. |
Process of photosynthesis cannot occur in absence of |
| A. | oxygen |
| B. | carbon dioxide |
| C. | carbon monoxide |
| D. | nitrogen |
| Answer» C. carbon monoxide | |
| 70. |
Organization of photosynthetic pigments into clusters is |
| A. | photosynthesis |
| B. | photosynthetic clusters |
| C. | cluster arrangement |
| D. | photo system |
| Answer» E. | |
| 71. |
Photosynthesis is process in which inorganic compounds are reduced to organic compounds using |
| A. | heat energy |
| B. | light energy |
| C. | chemical energy |
| D. | electrical energy |
| Answer» C. chemical energy | |
| 72. |
The alternative path adopted by photo excited electrons is |
| A. | cyclic electron flow |
| B. | non-cyclic electron flow |
| C. | Both A and B |
| D. | None of Above |
| Answer» B. non-cyclic electron flow | |
| 73. |
Chlorophyll b facilitate chlorophyll a by passing absorbed |
| A. | heat energy |
| B. | light energy |
| C. | light |
| D. | heat |
| Answer» D. heat | |
| 74. |
The synthesis of ATP by initiation of reaction with light is called |
| A. | photophosphorylation |
| B. | photolysis |
| C. | photo system |
| D. | photosynthesis |
| Answer» B. photolysis | |
| 75. |
Photosynthetic prokaryotes have special photosynthetic membranes which work like |
| A. | lumen |
| B. | stamen |
| C. | thylakoids |
| D. | stroma |
| Answer» D. stroma | |
| 76. |
Photosynthesis is the process in which inorganic compounds are reduced to organic compounds using |
| A. | heat energy |
| B. | light energy |
| C. | chemical energy |
| D. | All of Above |
| Answer» C. chemical energy | |
| 77. |
The enzyme which catalyze the reaction of Calvin cycle is known as |
| A. | phosphatase |
| B. | catalase |
| C. | rubisco |
| D. | None of Above |
| Answer» D. None of Above | |
| 78. |
The oxidizing agent which removes hydrogen from fumarate is called |
| A. | FAD |
| B. | NAD |
| C. | NADP |
| D. | NADPH |
| Answer» B. NAD | |
| 79. |
The dense fluid filled region which helps in producing carbohydrate molecules is called |
| A. | lumen |
| B. | carpel |
| C. | stroma |
| D. | grana |
| Answer» D. grana | |
| 80. |
The end product of glycol sis is |
| A. | glucose |
| B. | pyruvic acid |
| C. | citric acid |
| D. | None of Above |
| Answer» C. citric acid | |
| 81. |
Light energy is absorbed by the pigment molecules present on |
| A. | Antenna pigment |
| B. | Antenna complex |
| C. | photo system |
| D. | None of Above |
| Answer» C. photo system | |
| 82. |
The second pay off phase of cellular respiration is called |
| A. | preparatory phase |
| B. | net phase |
| C. | respiratory phase |
| D. | oxidative phase |
| Answer» E. | |
| 83. |
Energy transformation in living systems is attained with help of |
| A. | photosynthesis |
| B. | respiration |
| C. | kreb's cycle |
| D. | None of Above |
| Answer» B. respiration | |
| 84. |
The smallest particles of light are called |
| A. | dust |
| B. | protons |
| C. | photons |
| D. | None of Above |
| Answer» D. None of Above | |
| 85. |
A molecule made up of copper and protein is called |
| A. | plastoquinone |
| B. | cytochromes |
| C. | plastocyanin |
| D. | None of Above |
| Answer» D. None of Above | |
| 86. |
The reactions which are light-independent are termed as |
| A. | light reactions |
| B. | dark reactions |
| C. | Both A and B |
| D. | None of Above |
| Answer» C. Both A and B | |
| 87. |
The instrument which helps to measure the ability of pigment to absorb light is called |
| A. | thermometer |
| B. | spectrophotometer |
| C. | hydrometer |
| D. | ceilometers |
| Answer» C. hydrometer | |
| 88. |
There is reduction as well as oxidation during photosynthesis hence called as |
| A. | redox process |
| B. | oxidative reaction |
| C. | reduction |
| D. | None of Above |
| Answer» B. oxidative reaction | |
| 89. |
When there is no exchange between leaves and the atmosphere due to balance of respiration and photosynthesis this condition is known as |
| A. | balanced point |
| B. | unbalanced point |
| C. | redemption point |
| D. | compensation point |
| Answer» E. | |
| 90. |
Thylakoid membrane produces ATP by the process of |
| A. | photosynthesis |
| B. | chemiosmosis |
| C. | chemosynthesis |
| D. | respiration |
| Answer» C. chemosynthesis | |
| 91. |
A compound which is found in all living cells and play a key role in energy transformations is |
| A. | ADP |
| B. | ATP |
| C. | chlorophyll |
| D. | granum |
| Answer» C. chlorophyll | |
| 92. |
Chlorophyll converts light energy into |
| A. | heat energy |
| B. | chemical energy |
| C. | Both A and B |
| D. | None of Above |
| Answer» C. Both A and B | |
| 93. |
The organization of photosynthetic pigments into clusters is |
| A. | photosynthesis |
| B. | photosynthetic clusters |
| C. | cluster arrangement |
| D. | photo system |
| Answer» E. | |
| 94. |
The wave-length of a visible light ranges between |
| A. | 360-678 |
| B. | 380-750 |
| C. | 280-670 |
| D. | 380-700` |
| Answer» C. 280-670 | |
| 95. |
Chlorophylls are soluble in |
| A. | organic solvents |
| B. | inorganic solvents |
| C. | Both A and B |
| D. | None of Above |
| Answer» B. inorganic solvents | |
| 96. |
The yellowing of the plants is due to the absence of |
| A. | calcium |
| B. | chlorophyll |
| C. | magnesium |
| D. | nitrogen |
| Answer» D. nitrogen | |
| 97. |
There is a chemical link between anabolism and catabolism in the form of |
| A. | ADP |
| B. | ATP |
| C. | Both A and B |
| D. | None of Above |
| Answer» C. Both A and B | |
| 98. |
During dark reactions the photosynthesis takes place by help of certain enzymes by the cycle called |
| A. | kerb's cycle |
| B. | life cycle |
| C. | Calvin cycle |
| D. | None of Above |
| Answer» D. None of Above | |
| 99. |
The exchange of gases between organism and environment is termed as |
| A. | internal respiration |
| B. | external respiration |
| C. | respiration |
| D. | acquired respiration |
| Answer» C. respiration | |
| 100. |
Fumarate is converted to malate while adding a molecule of |
| A. | hydrogen |
| B. | sugar |
| C. | nitrogen |
| D. | water |
| Answer» E. | |