MCQOPTIONS
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MCQOPTIONS
This section includes 657 Mcqs, each offering curated multiple-choice questions to sharpen your Testing Subject knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
In the context of biological evolution, the disappearance of limbs in snakes is explained by - |
| A. | use and disuse of organs |
| B. | from the adversity of living in below |
| C. | by natural selection |
| D. | by inheritance of acquired traits |
| Answer» B. from the adversity of living in below | |
| 2. |
The end product of oxygen respiration is |
| A. | carbon and water |
| B. | oxygen and water |
| C. | carbon dioxide and oxygen |
| D. | ethyl alcohol |
| Answer» B. oxygen and water | |
| 3. |
Which of the following tree requires maximum amount of water for its growth? |
| A. | Mango |
| B. | acacia |
| C. | guava |
| D. | eucalyptus |
| Answer» E. | |
| 4. |
The growth motions of plants which are due to the stimulation of light are called - |
| A. | geotropism |
| B. | heliotropism |
| C. | hydrotropism |
| D. | thigmotropism |
| Answer» C. hydrotropism | |
| 5. |
Oxenometer is used to - |
| A. | measuring the rate of photosynthesis |
| B. | in measuring growth |
| C. | in measuring the rate of attraction |
| D. | measuring the rate of energy loss |
| Answer» C. in measuring the rate of attraction | |
| 6. |
Plants grow in |
| A. | for life |
| B. | only for a specified period |
| C. | intermittent life |
| D. | plants do not grow |
| Answer» B. only for a specified period | |
| 7. |
The end product of anoxic respiration is |
| A. | pyruvic acid |
| B. | ethyl alcohol |
| C. | starch |
| D. | sugar |
| Answer» C. starch | |
| 8. |
Seeds sown deep in the ground usually do not germinate because - |
| A. | they can't get air |
| B. | they don't get nitrogen |
| C. | they are under great pressure |
| D. | they don't get light |
| Answer» B. they don't get nitrogen | |
| 9. |
What is Indole Acetic Acid? |
| A. | Enzyme |
| B. | fungicide |
| C. | amino acids |
| D. | Auxin |
| Answer» E. | |
| 10. |
Which statement regarding auxin is correct? |
| A. | Due to this, the top prominence in plants becomes |
| B. | It prevents wilting of leaves |
| C. | It really destroys the hull. |
| D. | All the above statements are correct. |
| Answer» E. | |
| 11. |
The center of respiration inside the cell is |
| A. | ribosome |
| B. | nucleus |
| C. | golgi body |
| D. | mitochondria |
| Answer» E. | |
| 12. |
Which of the following statements is correct regarding hormones? |
| A. | It is a special organic compound that, in small amounts, affects and regulates growth and metabolic activities. |
| B. | These are also called growth control substances. |
| C. | Its effect is different at different concentrations and different organs. |
| D. | all the above statements are correct |
| Answer» E. | |
| 13. |
Which of the following plant hormones elongates dwarf plants and also helps in flower formation? |
| A. | Auxin |
| B. | Gibberellin |
| C. | cytokinins |
| D. | abscisic acid |
| Answer» C. cytokinins | |
| 14. |
Fruit ripening hormones are |
| A. | Gibberellin |
| B. | Ethylene |
| C. | cytokinins |
| D. | Auxin |
| Answer» C. cytokinins | |
| 15. |
ATP stands for- |
| A. | adenosine triphosphate |
| B. | adenine triphosphate |
| C. | adenosine diphosphate |
| D. | adenosine tetraphosphate |
| Answer» B. adenine triphosphate | |
| 16. |
Gibberellin is isolated from - |
| A. | from an algae |
| B. | from a fungus |
| C. | from a bacterium |
| D. | from a virus |
| Answer» C. from a bacterium | |
| 17. |
It is not advisable to sleep under trees at night, because - |
| A. | They release carbon dioxide at night |
| B. | They release oxygen gas at night |
| C. | They release carbon dioxide and oxygen gas during the night. |
| D. | none of these |
| Answer» B. They release oxygen gas at night | |
| 18. |
Carbon dioxide gas is liberated by |
| A. | Under Rasarohan |
| B. | Under transpiration |
| C. | Under photosynthesis |
| D. | Under respiration |
| Answer» E. | |
| 19. |
Which one of the following plant hormones keeps the seeds dormant and plays a major role in the fusion of leaves? |
| A. | Auxin |
| B. | Gibberellin |
| C. | cytokinins |
| D. | abscisic acid |
| Answer» E. | |
| 20. |
The plant hormone that helps in cell division is |
| A. | abscisic acid |
| B. | Gibberellin |
| C. | cytokinins |
| D. | Auxin |
| Answer» D. Auxin | |
| 21. |
Auxins are - |
| A. | growth stimulator |
| B. | destroyers of growth |
| C. | growth hormone |
| D. | growth inhibitor |
| Answer» D. growth inhibitor | |
| 22. |
Respiratory measuring instrument is called- |
| A. | potometer |
| B. | Ocgenometer |
| C. | Autometer |
| D. | respirometer |
| Answer» E. | |
| 23. |
The biological process in which sugars and fats are oxidised and energy is released is called |
| A. | respiration |
| B. | transpiration |
| C. | Photosynthesis |
| D. | fermentation |
| Answer» B. transpiration | |
| 24. |
The first stable compound of photosynthesis is |
| A. | phosphoglyceric acid |
| B. | starch |
| C. | glucose |
| D. | diphosphoglyceric acid |
| Answer» D. diphosphoglyceric acid | |
| 25. |
The role of foliage in photosynthesis is |
| A. | water absorption |
| B. | absorption of light |
| C. | carbon dioxide absorption |
| D. | none of these |
| Answer» C. carbon dioxide absorption | |
| 26. |
The end product of photosynthesis is |
| A. | Carbohydrate |
| B. | Carbon dioxide |
| C. | oxygen |
| D. | water |
| Answer» B. Carbon dioxide | |
| 27. |
The process of photosynthesis is accomplished by which of the following energy conversions? |
| A. | chemical energy from light |
| B. | heat energy from light |
| C. | biochemical energy from heat |
| D. | kinetic energy from heat |
| Answer» B. heat energy from light | |
| 28. |
The lowest rate of photosynthesis is |
| A. | in red light |
| B. | in blue light |
| C. | in purple light |
| D. | in green light |
| Answer» D. in green light | |
| 29. |
The photosynthetic organelle is - |
| A. | mitochondria |
| B. | lysosomes |
| C. | ribosome |
| D. | green cover |
| Answer» E. | |
| 30. |
The process of preparing food for plants and trees is called |
| A. | Carbohydrolysis |
| B. | metabolic synthosis |
| C. | Photosynthesis |
| D. | Photosynthesis |
| Answer» E. | |
| 31. |
Which fiber is helpful for making chlorophyll in plants? |
| A. | calcium |
| B. | Phosphorus |
| C. | magnesium |
| D. | potassium |
| Answer» D. potassium | |
| 32. |
The first step of the process of photosynthesis is |
| A. | fixation of carbon dioxide |
| B. | Stimulation of chlorophyll by sunlight |
| C. | release of oxygen from water |
| D. | manufacture of carbohydrates |
| Answer» C. release of oxygen from water | |
| 33. |
Photosynthesis takes place - |
| A. | at night |
| B. | in day and night |
| C. | in day or night |
| D. | only in the day |
| Answer» E. | |
| 34. |
The highest rate of photosynthesis is |
| A. | in purple light |
| B. | in green light |
| C. | in blue light |
| D. | in red light |
| Answer» E. | |
| 35. |
It is needed for photosynthesis- |
| A. | water |
| B. | Leafy |
| C. | Sunlight |
| D. | all of the above |
| Answer» E. | |
| 36. |
Leaves have two main functions - |
| A. | transpiration and respiration |
| B. | Respiration and digestion |
| C. | photosynthesis and respiration |
| D. | photosynthesis and transpiration |
| Answer» E. | |
| 37. |
Transpiration takes place in - |
| A. | Carbon dioxide comes out from the leaves. |
| B. | Water comes out in the form of vapor from the leaves. |
| C. | Water comes out in the form of a drop from the leaves |
| D. | Oxygen is released from the leaves. |
| Answer» C. Water comes out in the form of a drop from the leaves | |
| 38. |
In which the process of transpiration takes place in the plant? |
| A. | Root |
| B. | Trunk |
| C. | leaf |
| D. | whole plant |
| Answer» E. | |
| 39. |
One of the actions in plants, which can reduce their temperature, is - |
| A. | Photosynthesis |
| B. | transpiration |
| C. | hydrolysis |
| D. | respiration |
| Answer» C. hydrolysis | |
| 40. |
As a result of which process the release of oxygen in plants takes place an absorption of carbon dioxide? |
| A. | Photosynthesis |
| B. | transpiration |
| C. | osmosis |
| D. | Diffusion |
| Answer» B. transpiration | |
| 41. |
The transpiration device is - |
| A. | hygrometer |
| B. | crescometer |
| C. | potometer |
| D. | Clinometer |
| Answer» D. Clinometer | |
| 42. |
Excessive use of fertilizers causes the death of plants. |
| A. | due to osmosis |
| B. | Due to external osmosis |
| C. | because of exploitation |
| D. | due to inflation |
| Answer» B. Due to external osmosis | |
| 43. |
The doors made of wood flourish in the rainy season. |
| A. | due to interosmosis |
| B. | due to absorption |
| C. | due to hair |
| D. | due to plasmacyte |
| Answer» C. due to hair | |
| 44. |
The definition of osmosis is - |
| A. | flow of solute through a semipermeable phase |
| B. | water flow without art |
| C. | The flow of solvent towards least concentration through a semi-permeable phase |
| D. | none of the above |
| Answer» D. none of the above | |
| 45. |
When a cell is placed in a solution containing more salt, it shrinks because - |
| A. | Saline water enters the cell |
| B. | Water comes out by external osmosis |
| C. | the cytoplasm breaks down |
| D. | Mineral salt breaks down cell wall |
| Answer» C. the cytoplasm breaks down | |
| 46. |
The bacteria which are smallest in size are called |
| A. | Sperm |
| B. | vibrio |
| C. | Dandanu |
| D. | Spirilla |
| Answer» B. vibrio | |
| 47. |
If a cell is reduced in size when it is placed all in a solution. Such a solution is - |
| A. | hypotonic |
| B. | hypertonic |
| C. | isotonic |
| D. | satisfied |
| Answer» C. isotonic | |
| 48. |
A cell grows in volume when it is placed in |
| A. | in a homogeneous solution |
| B. | in a hypertonic solution |
| C. | In a tiny solution |
| D. | none of these |
| Answer» D. none of these | |
| 49. |
Seeds swell when placed in water |
| A. | due to osmosis |
| B. | due to absorption |
| C. | due to hydrolysis |
| D. | due to cytoplasmic contraction |
| Answer» C. due to hydrolysis | |
| 50. |
The exponents of binomial system are - |
| A. | Linnaeus |
| B. | Theophrastus |
| C. | Echinson |
| D. | angler |
| Answer» B. Theophrastus | |