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MCQOPTIONS
This section includes 200950 Mcqs, each offering curated multiple-choice questions to sharpen your General Knowledge knowledge and support exam preparation. Choose a topic below to get started.
| 12251. |
Virus free plants can be obtained through |
| A. | Anitibiotic treatment |
| B. | Bordeaux micture |
| C. | Root tip culture |
| D. | Shoot tip culture |
| Answer» E. | |
| 12252. |
DNA fingerprinting is based on.. |
| A. | Occurance of VNTR’s |
| B. | Knowledge of human karyotype |
| C. | Cloned DNA |
| D. | Recombinant DNA |
| Answer» B. Knowledge of human karyotype | |
| 12253. |
In forensic science which of the following is used? |
| A. | Bacterial cloning |
| B. | DNA foot printing |
| C. | DNA fingerprinting |
| D. | DNA cloning |
| Answer» D. DNA cloning | |
| 12254. |
Variations observed during tissue culture of some plants are known as |
| A. | Clonal variations |
| B. | Somatic variations |
| C. | Somaclonal variations |
| D. | Tissue culture variations |
| Answer» D. Tissue culture variations | |
| 12255. |
Which ones produce androgenic haploids in anther cultures? |
| A. | Anther wall |
| B. | Tapetal layer of anther wall |
| C. | Connective tissue |
| D. | Young pollengrains |
| Answer» E. | |
| 12256. |
VNTRs represnets- |
| A. | New terminal regions in DNA |
| B. | Functional genes in the DNA |
| C. | Split genes in the sample DNA |
| D. | Specific non-coding sequences with unique tandem repeats |
| Answer» E. | |
| 12257. |
Due to contraction of eyeball, a longsighted eye can see only.. |
| A. | nearer objects which is corrected by using convex lens |
| B. | nearer objects which is corrected by using concave lens |
| C. | father objects which is corrected by using concave lens |
| D. | father objects which is corrected by using convex lens |
| Answer» E. | |
| 12258. |
In dry regions, the leaf size of a tree becomes smaller. It is so to. |
| A. | reduce transpiration |
| B. | reduce metabolism maintain natural growth |
| C. | maintain natural growth |
| D. | protect plant from animals |
| Answer» B. reduce metabolism maintain natural growth | |
| 12259. |
The liver disease Hepatitis-B is caused by ... |
| A. | DNA Virus |
| B. | Hepatitis B virus |
| C. | Bacterium |
| D. | Platyhelminth |
| Answer» C. Bacterium | |
| 12260. |
CT Scan is done by using ... |
| A. | Infra-red rays |
| B. | Visible light |
| C. | Ultrasonic waves |
| D. | X-rays |
| Answer» E. | |
| 12261. |
When we eat something we like, our mouth waters. This is actually not water fluid secreted form. |
| A. | nasal glands |
| B. | salivary glands |
| C. | oval epithelium |
| D. | tongue |
| Answer» C. oval epithelium | |
| 12262. |
Nepenthes Khasiana, a rare and endangered plant is found in.. |
| A. | Meghalaya |
| B. | Himachal Pradesh |
| C. | Madhya Pradesh |
| D. | Uttar Pradesh |
| Answer» B. Himachal Pradesh | |
| 12263. |
Egg is rich source of nutrients except.. |
| A. | Fats |
| B. | Vitamin D |
| C. | Protein |
| D. | Vitamin C |
| Answer» E. | |
| 12264. |
Engyme is a ..... |
| A. | Vitamin |
| B. | Bacterium |
| C. | Bio-catalyst |
| D. | Virus |
| Answer» D. Virus | |
| 12265. |
'Biosphere Reserve Project' is aimed at protecting. |
| A. | Cattle population |
| B. | Human beings from pollution |
| C. | Flora and Fauna |
| D. | Environment |
| Answer» D. Environment | |
| 12266. |
The largest ecosystem of the Earth is ? |
| A. | Biome |
| B. | Biosphere |
| C. | Hydrosphere |
| D. | Lithosphere |
| Answer» C. Hydrosphere | |
| 12267. |
Influenza is caused by a ... |
| A. | Virus |
| B. | Fungus |
| C. | Algae |
| D. | Bacterium |
| Answer» B. Fungus | |
| 12268. |
The rotation of crops is essential for .. |
| A. | Increasing protein content in plants |
| B. | Getting different crops |
| C. | Increasing soil fertility |
| D. | Maintaining soil moisture |
| Answer» D. Maintaining soil moisture | |
| 12269. |
The study related to the plants being used as vegetable is called .. |
| A. | Flori-culture |
| B. | Pomology |
| C. | Horticulture |
| D. | Olericulture |
| Answer» E. | |
| 12270. |
Human breath is visible in winter but not in summer because.. |
| A. | water vapour in breath condenses in cold air, making it visible |
| B. | the difference in outside pressure gives visibility to breath |
| C. | breath contains certain impurities and visible matters |
| D. | none of these |
| Answer» B. the difference in outside pressure gives visibility to breath | |
| 12271. |
The normal cholesterol level in human blood is.. |
| A. | 180-200 mg |
| B. | 140-180 mg |
| C. | 120-140 mg |
| D. | 80-120 mg |
| Answer» B. 140-180 mg | |
| 12272. |
The Dried flower buds are used as a spice in. |
| A. | Cloves |
| B. | Saffron |
| C. | Cardamom |
| D. | Cinnamon |
| Answer» B. Saffron | |
| 12273. |
The tissue in man where no cell division occurs after birth is _____ . |
| A. | Connective |
| B. | Nerves |
| C. | Germinal |
| D. | Skeletal |
| Answer» B. Nerves | |
| 12274. |
Syrinx is the voice box in ___ . |
| A. | Mammals |
| B. | Amphibians |
| C. | Birds |
| D. | Reptiles |
| Answer» D. Reptiles | |
| 12275. |
Which of the following statements is NOT true about the open ocean? |
| A. | The open ocean has low levels of nutrients. |
| B. | Organisms in the deep ocean are exposed to frigid temperatures and total darkness. |
| C. | The open ocean begins at the low-tide mark and extends to the end of the continental shelf. |
| D. | Most of the photosynthetic activity on Earth occurs in the open ocean within the photic zone. |
| Answer» D. Most of the photosynthetic activity on Earth occurs in the open ocean within the photic zone. | |
| 12276. |
Which is one way a freshwater wetland differs from a lake or pond? |
| A. | Water flows in a lake or pond but never flows in a wetland. |
| B. | Wetlands are nesting areas for birds, but lakes and ponds are not. |
| C. | Water does not always cover a wetland as it does a lake or pond. |
| D. | Wetlands are salty, but lakes and ponds are fresh. |
| Answer» D. Wetlands are salty, but lakes and ponds are fresh. | |
| 12277. |
Which animal would be found in the biome that has cold to moderate winters, warm summers, and fertile soils; and is home to a variety of vegetation, such as coniferous trees, broadleaf deciduous trees, flowering shrubs, and ferns? |
| A. | whitetail deer |
| B. | polar bear |
| C. | iguana |
| D. | caribou |
| Answer» B. polar bear | |
| 12278. |
Which of the following occurs during the ecological succession of an ecosystem? |
| A. | An ecosystem reaches a final, unchanging stage. |
| B. | Animals move out of the ecosystem until succession is complete. |
| C. | Living organisms modify their environment a little at a time. |
| D. | Parts of communities split off to form new communities. |
| Answer» D. Parts of communities split off to form new communities. | |
| 12279. |
Which landforms are not classified into a major biome? |
| A. | prairies |
| B. | mountain ranges |
| C. | coastlines |
| D. | islands |
| Answer» C. coastlines | |
| 12280. |
Which of the following is a factor that makes estuaries unique? |
| A. | They contain both phytoplankton and zooplankton. |
| B. | They are very deep and dark but contain a lot of producers. |
| C. | They are found in mountain ranges and are formed by melting snow. |
| D. | They have a lot of biomass but not a large variety of species. |
| Answer» E. | |
| 12281. |
Which two biomes have the least precipitation? |
| A. | tropical rain forest and temperate grassland |
| B. | tropical savanna and tropical dry forest |
| C. | tundra and desert |
| D. | boreal forest and temperate woodland and shrubland |
| Answer» D. boreal forest and temperate woodland and shrubland | |
| 12282. |
Which is a factor that could interrupt the progress of succession? |
| A. | colonization of surfaces by lichens |
| B. | different animals appearing at each stage |
| C. | another natural disturbance |
| D. | long-term fluctuations in climate |
| Answer» D. long-term fluctuations in climate | |
| 12283. |
Climate is a global factor that produces. |
| A. | Earth's unique ocean and atmosphere. |
| B. | the shape and elevation of landmasses. |
| C. | a wide range of environmental conditions that shape communities. |
| D. | solar energy within the atmosphere. |
| Answer» D. solar energy within the atmosphere. | |
| 12284. |
A predator is an animal that. |
| A. | kills and eats other animals |
| B. | eats plants. |
| C. | lives on another animal without harming it. |
| D. | lives inside another animal. |
| Answer» B. eats plants. | |
| 12285. |
Several species of warblers can live in the same spruce tree ONLY because they. |
| A. | have different habitats within the tree. |
| B. | don't eat food from the tree. |
| C. | occupy different niches within the tree. |
| D. | can find different temperatures within the tree. |
| Answer» D. can find different temperatures within the tree. | |
| 12286. |
The tendency for warm air to rise and cool air to sink results in.. |
| A. | global wind patterns. |
| B. | ocean upwelling. |
| C. | the seasons. |
| D. | regional precipitation. |
| Answer» B. ocean upwelling. | |
| 12287. |
Primary succession would most likely occur after. |
| A. | a forest fire. |
| B. | a lava flow. |
| C. | farm land is abandoned. |
| D. | a severe storm. |
| Answer» C. farm land is abandoned. | |
| 12288. |
A wolf pack hunts, kills, and feeds on a moose. In this interaction, the wolves are. |
| A. | hosts. |
| B. | prey |
| C. | mutualists |
| D. | predators. |
| Answer» E. | |
| 12289. |
Which of the following is a biological aspect of an organism's niche? |
| A. | the water in the area |
| B. | the way it gets food |
| C. | amount of sunlight |
| D. | composition of soil |
| Answer» C. amount of sunlight | |
| 12290. |
Polar bears live in the arctic. The arctic is their. |
| A. | niche. |
| B. | habitat. |
| C. | tolerance. |
| D. | microclimate. |
| Answer» C. tolerance. | |
| 12291. |
Nitrogen fixation is carried out primarily by.. |
| A. | humans. |
| B. | plants. |
| C. | bacteria. |
| D. | consumers. |
| Answer» D. consumers. | |
| 12292. |
Which is a biotic factor that affects the size of a population in a specific ecosystem? |
| A. | average temperature of the ecosystem |
| B. | type of soil in the ecosystem |
| C. | number and kinds of predators in the ecosystem |
| D. | concentration of oxygen in the ecosystem |
| Answer» D. concentration of oxygen in the ecosystem | |
| 12293. |
The movements of energy and nutrients through living systems are different because. |
| A. | energy flows in one direction, and nutrients recycle. |
| B. | energy is limited in the biosphere, and nutrients are always available. |
| C. | nutrients flow in one direction, and energy recycles. |
| D. | energy forms chemical compounds, and nutrients are lost as heat. |
| Answer» B. energy is limited in the biosphere, and nutrients are always available. | |
| 12294. |
The greenhouse effect is.. |
| A. | something that has only occurred for the last 50 years. |
| B. | a natural phenomenon that maintains Earth's temperature range. |
| C. | the result of the differences in the angle of the sun's rays. |
| D. | an unnatural phenomenon that causes heat energy to be radiated back into the atmosphere. |
| Answer» C. the result of the differences in the angle of the sun's rays. | |
| 12295. |
If a lake receives a large input of a limiting nutrient, which of these would happen first? |
| A. | An algal bloom occurs. |
| B. | Algae begin to die and decomposers take over. |
| C. | Nitrogen compounds are recycled. |
| D. | The concentration of oxygen drops below the necessary level. |
| Answer» B. Algae begin to die and decomposers take over. | |
| 12296. |
Which is an example of how biotic and abiotic factors interact? |
| A. | Sunlight increases the temperature of pond water. |
| B. | Water and soil mix together to make mud. |
| C. | Tree roots split apart rocks in the ground. |
| D. | Humidity in the air forms fog in a valley. |
| Answer» D. Humidity in the air forms fog in a valley. | |
| 12297. |
Animals get the most of the nitrogen they need. |
| A. | by consuming plants or other animals. |
| B. | by breathing in atmospheric nitrogen. |
| C. | directly from bacteria in the soil. |
| D. | from the process of denitrification. |
| Answer» B. by breathing in atmospheric nitrogen. | |
| 12298. |
A word that means the same thing as consumer is.. |
| A. | producer. |
| B. | autotroph |
| C. | heterotroph |
| D. | carbohydrate. |
| Answer» D. carbohydrate. | |
| 12299. |
What is the term for each step in the transfer of energy and matter within a food web? |
| A. | energy path |
| B. | food chain |
| C. | trophic level |
| D. | food pyramid |
| Answer» D. food pyramid | |
| 12300. |
Compared to land, the open oceans. |
| A. | are nutrient-rich environments. |
| B. | contain unlimited nitrogen. |
| C. | are nutrient-poor environments. |
| D. | are rich in silica and iron. |
| Answer» D. are rich in silica and iron. | |