MCQOPTIONS
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MCQOPTIONS
This section includes 40 Mcqs, each offering curated multiple-choice questions to sharpen your Biology Mcqs knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which one is a non-renewable resource? |
| A. | Wild life |
| B. | Forests |
| C. | Natural gas |
| D. | Land |
| Answer» D. Land | |
| 2. |
Process that supplies food to living things through decaying and decomposition is called |
| A. | Food cycle |
| B. | Nutrient cycle |
| C. | Dead-live cycle |
| D. | None of these |
| Answer» C. Dead-live cycle | |
| 3. |
Balance in the nutrient cycle can be upset when |
| A. | Too much food is consumed |
| B. | Not enough food is produced |
| C. | Decayed nutrients are not returned to the ground |
| D. | All of these |
| Answer» E. | |
| 4. |
In air nitrogen is |
| A. | 57% |
| B. | 20% |
| C. | 79% |
| D. | 30% |
| Answer» D. 30% | |
| 5. |
In air % of oxygen and carbon dioxide is |
| A. | Oxygen 20%, CO2 0.03% |
| B. | Oxygen 50%, CO2 50% |
| C. | Oxygen 30%, CO2 0.05% |
| D. | Oxygen 25%, CO2 0.02% |
| Answer» B. Oxygen 50%, CO2 50% | |
| 6. |
Water constitutes % of body weight? |
| A. | 25-30% |
| B. | 70-90% |
| C. | 10-30% |
| D. | 30-50% |
| Answer» C. 10-30% | |
| 7. |
Total area of the world under cultivation is |
| A. | 5% |
| B. | 11% |
| C. | 21% |
| D. | 31% |
| Answer» C. 21% | |
| 8. |
Wild life refers to |
| A. | All plants of the world |
| B. | All non cultivated plants |
| C. | Non domesticated animals |
| D. | Both b and c |
| Answer» E. | |
| 9. |
Endangered species are |
| A. | Dangerous for the life of humans |
| B. | Reduced in number |
| C. | Already extinct |
| D. | All of these |
| Answer» C. Already extinct | |
| 10. |
______% of our energy requirements are met from fossil fuels |
| A. | 50 |
| B. | 55 |
| C. | 90 |
| D. | 95 |
| Answer» E. | |
| 11. |
Which sequence is correct? |
| A. | Dead plants?lignite?peat?coal |
| B. | Dead plants?peat?lignite?coal |
| C. | Dead plants?coal?lignite?ash |
| D. | Dead animals?peat?lignite?coal |
| Answer» E. | |
| 12. |
Hydroelectricity is generated by using ______ of falling water. |
| A. | Potential energy |
| B. | Gravitational energy |
| C. | Kinetic energy |
| D. | All of these |
| Answer» D. All of these | |
| 13. |
Driving force for all the cycles in ecosystem is |
| A. | Water |
| B. | Soil |
| C. | Sun |
| D. | Air |
| Answer» D. Air | |
| 14. |
Tides are caused by |
| A. | Gravitational pull of sun |
| B. | Movements of large animals in water |
| C. | Uneven water body floor |
| D. | High winds |
| Answer» B. Movements of large animals in water | |
| 15. |
Which gas commonly causes green house effect? |
| A. | Hydrogen sulphide |
| B. | Carbon dioxide |
| C. | Nitrogen gas |
| D. | Carbon monoxide |
| Answer» C. Nitrogen gas | |
| 16. |
Causes of green house effect are |
| A. | Over urbanization |
| B. | Deforestation |
| C. | Industrialization |
| D. | All of these |
| Answer» E. | |
| 17. |
Incomplete burning of carbon compounds cause release of |
| A. | Carbon dioxide |
| B. | Carbon monoxide |
| C. | Oxides of nitrogen |
| D. | CFCs |
| Answer» C. Oxides of nitrogen | |
| 18. |
Algal bloom is also called as |
| A. | Deforestation |
| B. | Eutrophication |
| C. | Neotrophication |
| D. | Lichen |
| Answer» C. Neotrophication | |
| 19. |
The chemical wastes from industry is called |
| A. | Industrial litter |
| B. | Industrial trash |
| C. | Industrial effluents |
| D. | Industrial deffluents |
| Answer» D. Industrial deffluents | |
| 20. |
Pesticides and fertilizers are also called |
| A. | Pestochemicals |
| B. | Industrochemicals |
| C. | Killing chemicals |
| D. | Agrochemicals |
| Answer» E. | |
| 21. |
Which are more susceptible to attacks of pests? |
| A. | Multicultures |
| B. | Monocultures |
| C. | Dicultures |
| D. | Polycultures |
| Answer» C. Dicultures | |
| 22. |
Which disease does not match its etiology? |
| A. | Kwashiorkor is a nutritional deficiency |
| B. | Alzheimer is a mental illness |
| C. | Cretinism is due to hormonal imbalance |
| D. | Cholera is physical disorder |
| Answer» E. | |
| 23. |
Detergents usually release |
| A. | Carbonates |
| B. | Sulphates |
| C. | Phosphates |
| D. | Nitrates |
| Answer» D. Nitrates | |
| 24. |
Diphtheria is |
| A. | Genetic disease |
| B. | Pathogenic disease |
| C. | Metabolic disease |
| D. | Nutritional disease |
| Answer» C. Metabolic disease | |
| 25. |
Which one the following is not nutritional disease? |
| A. | Scurvy |
| B. | Anemia |
| C. | Goiter |
| D. | Diabetes |
| Answer» E. | |
| 26. |
Wind blows from area of |
| A. | Low pressure to high pressure |
| B. | High pressure to low pressure |
| C. | Moderate pressure to high pressure |
| D. | Low pressure to low pressure |
| Answer» C. Moderate pressure to high pressure | |
| 27. |
Geothermal energy is |
| A. | Energy obtained from nuclear fuel |
| B. | Energy obtained from burning natural fuels |
| C. | Heat energy trapped underground |
| D. | Energy obtained from blowing hot winds |
| Answer» D. Energy obtained from blowing hot winds | |
| 28. |
Hot substance is escaped from inside the earth in the form of |
| A. | Volcanoes |
| B. | Hot springs |
| C. | Geysers |
| D. | All of these |
| Answer» E. | |
| 29. |
In oceans of tropical regions |
| A. | Temperature of surface water is 40?C and 10?C at depth |
| B. | Temp of surface water is 25?C and 5?C at depth |
| C. | Surface water 50?C and depth 20?C |
| D. | Surface water 10?C and depth 15?C |
| Answer» C. Surface water 50?C and depth 20?C | |
| 30. |
Study of human population and things that affect them is |
| A. | Ecology |
| B. | Demography |
| C. | Demology |
| D. | Environment study |
| Answer» C. Demology | |
| 31. |
In 1947 population of Pakistan was |
| A. | 32.5 million |
| B. | 35.5 million |
| C. | 40.5 million |
| D. | 45.5 million |
| Answer» B. 35.5 million | |
| 32. |
Rate of population growth in 1980s was |
| A. | 10% |
| B. | 1% |
| C. | 2% |
| D. | 15% |
| Answer» D. 15% | |
| 33. |
Replantation of plants in the areas where they were present earlier is called |
| A. | Deforestation |
| B. | Aforestation |
| C. | Forestation |
| D. | Reforestation |
| Answer» E. | |
| 34. |
Establishment of new forests where no forests existed previously is called |
| A. | Reforestation |
| B. | Forestation |
| C. | Neofrestation |
| D. | Aforestation |
| Answer» E. | |
| 35. |
Which is environmental buffer? |
| A. | Mountains |
| B. | Deserts |
| C. | Forests |
| D. | Oceans |
| Answer» D. Oceans | |
| 36. |
About half of the rain which falls in tropical forests comes from |
| A. | High winds |
| B. | Cold surroundings |
| C. | Transpiration of plants |
| D. | Surrounding seas |
| Answer» D. Surrounding seas | |
| 37. |
Biodiversity is |
| A. | Total number of species in a community |
| B. | Total number of species in an ecosystem |
| C. | Total number of genus in an ecosystem |
| D. | None of these |
| Answer» C. Total number of genus in an ecosystem | |
| 38. |
Which statement is not true about ozone? |
| A. | Bluish |
| B. | Explosive |
| C. | 10-50 km |
| D. | O2 |
| Answer» E. | |
| 39. |
Ozone depletion is commonly caused by |
| A. | CFCs |
| B. | Industrial smoke |
| C. | Heavy nitrogen gasses |
| D. | Carbon dioxide |
| Answer» B. Industrial smoke | |
| 40. |
Diseases caused by UV rays in humans |
| A. | Skin cancers |
| B. | Cataracts |
| C. | Night blindness |
| D. | Both a and b |
| Answer» E. | |