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.
| 101. |
The oxygen which is released during the process of photosynthesis comes from |
| A. | hydrogen |
| B. | leaves |
| C. | water |
| D. | None of Above |
| Answer» D. None of Above | |
| 102. |
Alcoholic fermentation and Lactic acid fermentation are |
| A. | aerobic |
| B. | anaerobic |
| C. | partially aerobic |
| D. | None of Above |
| Answer» C. partially aerobic | |
| 103. |
The phases of Calvin cycle involves |
| A. | carbon fixation |
| B. | reduction |
| C. | regeneration |
| D. | All of Above |
| Answer» E. | |
| 104. |
The tail attached to the pyrrole ring is called |
| A. | porpyrin |
| B. | tail |
| C. | phytol |
| D. | None of Above |
| Answer» D. None of Above | |
| 105. |
The chloroplast is present inside the leaf within tissue called |
| A. | mesophyll |
| B. | microphyll |
| C. | epidermis |
| D. | None of Above |
| Answer» B. microphyll | |
| 106. |
Chlorophyll (a) has the ability to absorb the wave length of light |
| A. | blue-red |
| B. | blue-green |
| C. | yellow green |
| D. | yellow blue |
| Answer» C. yellow green | |
| 107. |
The leaves are the major sites for the presence of |
| A. | lamina |
| B. | branches |
| C. | chloroplast |
| D. | None of Above |
| Answer» D. None of Above | |
| 108. |
The specialized molecule which traps high energy electron and to electron carriers is |
| A. | primary acceptor |
| B. | electron acceptor |
| C. | primary electron acceptor |
| D. | electron acceptor |
| Answer» D. electron acceptor | |
| 109. |
Glycol sis mean splitting of |
| A. | nitrogen |
| B. | oxygen |
| C. | sugar |
| D. | protein |
| Answer» D. protein | |
| 110. |
The study of energy relationships and energy conversions in biological systems is termed as |
| A. | microbiology |
| B. | biotechnology |
| C. | bioenergetics |
| D. | None of Above |
| Answer» D. None of Above | |
| 111. |
Cytochrome is oxidized by |
| A. | atom of oxygen |
| B. | electrons |
| C. | protons |
| D. | A and B |
| Answer» E. | |
| 112. |
T.W.Engleman in 1833 obtained the first action spectrum while working on |
| A. | bacteria |
| B. | virus |
| C. | spirogyra |
| D. | None of Above |
| Answer» D. None of Above | |
| 113. |
The molecule of chlorophyll is composed of |
| A. | hydrophyllic head |
| B. | tail |
| C. | Both A and B |
| D. | None of Above |
| Answer» D. None of Above | |
| 114. |
Photosynthesis occur in time of |
| A. | day |
| B. | night |
| C. | all the time |
| D. | winters |
| Answer» B. night | |
| 115. |
The process of photosynthesis cannot occur in the absence of |
| A. | oxygen |
| B. | carbon dioxide |
| C. | Both A and B |
| D. | None of Above |
| Answer» C. Both A and B | |
| 116. |
The chlorophyll which is found in photosynthetic bacteria is known as |
| A. | bacteriphylls |
| B. | bacteriochlorophylls |
| C. | bacteriophtosynthetic |
| D. | bacteriophage |
| Answer» C. bacteriophtosynthetic | |
| 117. |
The type of respiration which humans adopt in severe physical activities is |
| A. | aerobic |
| B. | anaerobic |
| C. | fermentation |
| D. | accumulation |
| Answer» C. fermentation | |
| 118. |
Light is the form of energy called |
| A. | electromagnetic energy |
| B. | radiations |
| C. | Both A and B |
| D. | None of Above |
| Answer» D. None of Above | |
| 119. |
The most abundant and most important photosynthetic pigment is |
| A. | chlorophyll-a |
| B. | chlorophyll-b |
| C. | chlorophyll-c |
| D. | chlorophyll-d |
| Answer» B. chlorophyll-b | |
| 120. |
During dark reactions the energy is stored in the molecules of |
| A. | carbon |
| B. | oxygen |
| C. | sugar |
| D. | None of Above |
| Answer» D. None of Above | |
| 121. |
The splitting of water molecule releasing oxygen is called |
| A. | photosynthesis |
| B. | photolysis |
| C. | photolytic |
| D. | photophosphorylation |
| Answer» C. photolytic | |
| 122. |
The special complex which is build in thylakoid membrane which helps in moving down gradient is called |
| A. | ATP complex |
| B. | ATP synthetase |
| C. | ATP synthase |
| D. | None of Above |
| Answer» D. None of Above | |
| 123. |
In photosynthesis carbon dioxide, light and water are |
| A. | reactants |
| B. | products |
| C. | by-products |
| D. | None of Above |
| Answer» B. products | |
| 124. |
porphyrin ring in hemoglobin molecules have in center an atom of |
| A. | magnesium |
| B. | iron |
| C. | hydrogen |
| D. | None of Above |
| Answer» C. hydrogen | |
| 125. |
WHAT_IS_REDUCTION_POTENTIAL??$ |
| A. | The molecule loses an electron |
| B. | An atom/molecule gains an electron |
| C. | Reducing the power of an electron |
| D. | Oxidation power of an electron |
| Answer» C. Reducing the power of an electron | |
| 126. |
WHAT_IS_THE_NAME_OF_THE_MOLECULE_WHICH_DONATES_ITS_ELECTRONS??$ |
| A. | Reducing agent |
| B. | Oxidative agent |
| C. | Standard reduction potential |
| D. | Oxidant |
| Answer» B. Oxidative agent | |
| 127. |
Which of the following act as a storage form of high energy phosphate? |
| A. | Glucose-6-phosphate |
| B. | Phosphoenolpyruvate |
| C. | Phosphagens |
| D. | Glycerol phosphate |
| Answer» D. Glycerol phosphate | |
| 128. |
What is the standard free energy change of ATP? |
| A. | Small and negative |
| B. | Large and positive |
| C. | Large and negative |
| D. | Small and positive |
| Answer» D. Small and positive | |
| 129. |
Which of the following equation gives the relationship between ∆G֯ and Keq?$ |
| A. | ∆G֯ = -RT ln K<sub>eq</sub> |
| B. | ∆G֯ = ln K<sub>eq</sub> |
| C. | ∆G = ∆G֯ (-RT K<sub>eq</sub>) |
| D. | ∆G = -RT ln K<sub>eq</sub> |
| Answer» B. ‚Äö√Ñ√∂‚àö‚Ć‚àö√∫G‚àö‚àë‚àö√≤ = ln K<sub>eq</sub> | |
| 130. |
Which of the following factor is not responsible for the actual change in free energy (∆G)?$ |
| A. | Temperature |
| B. | Pressure |
| C. | The initial concentration of reactant and products |
| D. | pH |
| Answer» E. | |
| 131. |
What is the value of ∆G, when a system is in equilibrium?$ |
| A. | ∆G = 0 |
| B. | ∆G = 1 |
| C. | ∆G = -1 |
| D. | ∆G = ∆G֯ |
| Answer» B. ‚Äö√Ñ√∂‚àö‚Ć‚àö√∫G = 1 | |
| 132. |
Which of the following equation shows the relationship between free energy change (∆G) and the change in entropy (∆S), under constant temperature and pressure?$ |
| A. | ∆G = T∆H – ∆S |
| B. | ∆G = T∆H/∆S |
| C. | ∆G = ∆H/T∆S |
| D. | ∆G = ∆H – T∆S |
| Answer» E. | |
| 133. |
Gibb’s free energy is the portion of the total energy which is available for useful work.$ |
| A. | True |
| B. | False |
| Answer» B. False | |
| 134. |
Law of thermodynamics which states that energy can neither be created nor be destroyed is ___________ |
| A. | The second law of thermodynamics |
| B. | Third law of thermodynamics |
| C. | First law of thermodynamics |
| D. | Zero-order kinetics |
| Answer» D. Zero-order kinetics | |