NEET Biology Organisms and population Question Bank

done Bio Geochemical Cycle Total Questions - 57

• question_answer1)
  Which of the following is the source of carbon to plants
  A)
  Atmospheric \[C{{O}_{2}}\] done clear
  B)
  \[C{{O}_{2}}\]of carbonate rocks  done clear
  C)
  Fossils done clear
  D)
  All the above done clear
  View Solution play_arrow

• question_answer2)
  The conversion of nitrate to nitrous oxide and nitrogen gas is termed as [KCET 2000]
  A)
  Nitrification done clear
  B)
  Denitrification done clear
  C)
  Nitrogen-fixation done clear
  D)
  None of these done clear
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• question_answer3)
  In nitrogen cycle, which of the following plays an important role
  A)
  Rhizopus done clear
  B)
  Nitrobacter done clear
  C)
  Mucor done clear
  D)
  All green algae done clear
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• question_answer4)
  Nitrogen cycle involves bacteria capable of changing proteins to ammonia called as
  A)
  Bacteria of decay done clear
  B)
  Denitrifying bacteria done clear
  C)
  Nitrogen fixing bacteria done clear
  D)
  Ammonifying bacteria done clear
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• question_answer5)
  Carbon is available to crop plants in the form of
  A)
  Amino acids done clear
  B)
  Carbon dioxide done clear
  C)
  Elemental carbon done clear
  D)
  Carbonates done clear
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• question_answer6)
  Which of the following contribute to the carbon cycle
  A)
  Photosynthesis done clear
  B)
  Respiration done clear
  C)
  Fossil fuel combustion done clear
  D)
  All above done clear
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• question_answer7)
  One of the following atoms often limit the primary productivity of an ecosystem
  A)
  Carbon done clear
  B)
  Nitrogen done clear
  C)
  Phosphorus done clear
  D)
  Sulphur done clear
  View Solution play_arrow

• question_answer8)
  Biogeochemical cycles can be traced in
  A)
  Ecosystems done clear
  B)
  Biomes done clear
  C)
  Only water done clear
  D)
  Both a and b done clear
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• question_answer9)
  The phosphorus cycle differs from those of carbon and nitrogen as well as those of sulphur, oxygen and hydrogen in that it lacks
  A)
  Water done clear
  B)
  Dust particles done clear
  C)
  Gaseous phase done clear
  D)
  All above done clear
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• question_answer10)
  In biogeochemical cycles, chemicals pass through
  A)
  Livings done clear
  B)
  Livings and non-livings done clear
  C)
  From non-living to living and living to non-living done clear
  D)
  None of the above done clear
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• question_answer11)
  The organisms which participate most actively in nitrogen cycle in nature are
  A)
  Saprophytic angiosperms done clear
  B)
  Parasitic angiosperms done clear
  C)
  Bacteria done clear
  D)
  Legumes done clear
  View Solution play_arrow

• question_answer12)
  Biocycle is referred as
  A)
  Realms done clear
  B)
  Habitat done clear
  C)
  Biological rythms done clear
  D)
  All the above done clear
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• question_answer13)
  Biogeochemcial cycles are of
  A)
  Two types done clear
  B)
  Three types done clear
  C)
  Four types done clear
  D)
  Five types done clear
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• question_answer14)
  Sedimentary cycle having a small gaseous component also is found in
  A)
  'P' cycle done clear
  B)
  'S' cycle done clear
  C)
  'N' cycle done clear
  D)
  'C' Cycle done clear
  View Solution play_arrow

• question_answer15)
  Which is involved in sedimentary cycle
  A)
  C done clear
  B)
  N done clear
  C)
  H done clear
  D)
  S done clear
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• question_answer16)
  The reservoir pool for gaseous cycles of matter is
  A)
  Atmosphere done clear
  B)
  Hydrosphere done clear
  C)
  Both a and b done clear
  D)
  Lithosphere done clear
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• question_answer17)
  The reservoir pool of carbon is
  A)
  Air and water done clear
  B)
  Fossil fuels done clear
  C)
  Rocks done clear
  D)
  All of these done clear
  View Solution play_arrow

• question_answer18)
  For recycling of materials which one is most necessary
  A)
  Producers done clear
  B)
  Consumers done clear
  C)
  Decomposers done clear
  D)
  None of above done clear
  View Solution play_arrow

• question_answer19)
  Burning of fossil fuels affects
  A)
  Nitrogen cycle done clear
  B)
  Carbon cycle done clear
  C)
  Phosphorus cycle done clear
  D)
  Water cycle done clear
  View Solution play_arrow

• question_answer20)
  In carbon cycle, source of carbon to plants is
  A)
  Atmospheric \[C{{O}_{2}}\] done clear
  B)
  Carbonate rocks done clear
  C)
  Fossil fuels done clear
  D)
  All of these done clear
  View Solution play_arrow

• question_answer21)
  The process of evapo-transpiration and precipitation is known as
  A)
  Carbon cycle done clear
  B)
  Hydrological cycle done clear
  C)
  Nitrogen cycle done clear
  D)
  All of these done clear
  View Solution play_arrow

• question_answer22)
  Global water cycle involves
  A)
  Forest trees done clear
  B)
  Algae done clear
  C)
  Microorganisms done clear
  D)
  Evaporation of water from water bodies done clear
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• question_answer23)
  Local water cycle involves
  A)
  Living beings done clear
  B)
  Physical factors done clear
  C)
  Atmosphere done clear
  D)
  None of these done clear
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• question_answer24)
  The agent/s which make/s free atmospheric nitrogen available to plants is/are
  A)
  Lightening done clear
  B)
  Free living nitrogen fixing bacteria done clear
  C)
  Symbiotic nitrogen fixing bacteria done clear
  D)
  All of these done clear
  View Solution play_arrow

• question_answer25)
  Non biological nitrogen fixation is
  A)
  Electrochemical done clear
  B)
  Photochemical done clear
  C)
  Both a and b done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer26)
  Phosphorus is mostly found in rocks in combination with
  A)
  Calcium done clear
  B)
  Iron done clear
  C)
  Aluminium done clear
  D)
  All of these done clear
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• question_answer27)
  Phosphorus cycle is
  A)
  Gaseous cycle done clear
  B)
  Perfect cycle done clear
  C)
  Imperfect cycle done clear
  D)
  Partly gaseous and partly sedimentary done clear
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• question_answer28)
  Phosphorus of ocean becomes available to land plants due to
  A)
  Sea birds done clear
  B)
  Deep sea activities done clear
  C)
  Ocean spray done clear
  D)
  All of these done clear
  View Solution play_arrow

• question_answer29)
  Volcano eruption disturbs
  A)
  Phosphorus cycle done clear
  B)
  Nitrogen cycle done clear
  C)
  Carbon cycle done clear
  D)
  Sulphur cycle done clear
  View Solution play_arrow

• question_answer30)
  Phosphorus cycles in the form of
  A)
  \[HP{{O}^{3-}}\] done clear
  B)
  \[{{P}^{2}}\] (gas) done clear
  C)
  \[PO_{4}^{3-}\] done clear
  D)
  \[A{{l}_{2}}{{(P{{O}_{4}})}_{3}}\] done clear
  View Solution play_arrow

• question_answer31)
  Inorganic element that changes food into usable energy is
  A)
  S done clear
  B)
  P done clear
  C)
  Ca done clear
  D)
  Mg done clear
  View Solution play_arrow

• question_answer32)
  Degradation of proteins play a part in
  A)
  Calvin cycle done clear
  B)
  Water cycle done clear
  C)
  Sulphur cycle done clear
  D)
  Nitrogen cycle done clear
  View Solution play_arrow

• question_answer33)
  In which of the following cycle, an atmospheric cycle is absent
  A)
  Carbon cycle done clear
  B)
  Phosphorus cycle done clear
  C)
  Nitrogen cycle done clear
  D)
  Sulphur cycle done clear
  View Solution play_arrow

• question_answer34)
  Which of the following is the major source of phosphorus
  A)
  Plants done clear
  B)
  Animals done clear
  C)
  Crystalline rocks done clear
  D)
  Deserts done clear
  View Solution play_arrow

• question_answer35)
  A biogeochemical cycle without an atmospheric component is
  A)
  Carbon cycle done clear
  B)
  Phosphorus cycle done clear
  C)
  Nitrogen cycle done clear
  D)
  Sulphur cycle done clear
  View Solution play_arrow

• question_answer36)
  Biogeochemical cycling refers to cycling of [DPMT 1983]
  A)
  Energy in the ecosystem done clear
  B)
  Nutrients in the ecosystem done clear
  C)
  Water done clear
  D)
  Gases between plants and animals done clear
  View Solution play_arrow

• question_answer37)
  Cycling of elements in an ecosystem is called [DPMT 1983; MP PMT 1987, 99; BHU 2000]
  A)
  Chemical cycle done clear
  B)
  Geochemical cycle done clear
  C)
  Biogeochemical cycle done clear
  D)
  Geological cycle done clear
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• question_answer38)
  The circulation or cycling of elements in an ecosystem is known as [MP PMT 1987; CBSE PMT 1999]
  A)
  Geological cycling done clear
  B)
  Geo-chemical cycling done clear
  C)
  Bio-geochemical cycling done clear
  D)
  Nutrient cycling done clear
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• question_answer39)
  Maximum contribution of \[{{O}_{2}}\] is from [CBSE PMT 1989]
  A)
  Phytoplankton done clear
  B)
  Grasslands done clear
  C)
  Herbs and shrubs done clear
  D)
  Dense forest done clear
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• question_answer40)
  In water receiving regions, what does forest regulate [MP PMT 1989]
  A)
  Hydrological cycle done clear
  B)
  Carbon cycle done clear
  C)
  Nitrogen cycle done clear
  D)
  Calcium cycle done clear
  View Solution play_arrow

• question_answer41)
  Which of the following cycle would be affected if decomposers of an ecosystem vanish [RPMT 1992]
  A)
  Producer's cycle done clear
  B)
  Consumer's cycle done clear
  C)
  Decomposer's cycle done clear
  D)
  Biogeochemical cycle done clear
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• question_answer42)
  Nitrogen is a critical element of the ecosystem because it is [BHU 1996]
  A)
  Essential element done clear
  B)
  Abundant in atmosphere done clear
  C)
  Labile done clear
  D)
  Fixed by microbes done clear
  View Solution play_arrow

• question_answer43)
  The phosphorus rich fertilizer obtained from sea birds along the coast of Chile and Peru, is [Rohtak 1996]
  A)
  Guano done clear
  B)
  Bone meal done clear
  C)
  Dung done clear
  D)
  Urea done clear
  View Solution play_arrow

• question_answer44)
  \[C{{O}_{2}}\] content of atmosphere has increased in the last 150 years from [AIIMS 1997]
  A)
  25 to 35 ppm done clear
  B)
  270 to 340 ppm done clear
  C)
  0.027 to 0.34 ppm done clear
  D)
  0.2 to 0.3 ppm done clear
  View Solution play_arrow

• question_answer45)
  Role of bacteria in carbon cycle is [CBSE PMT 1998]
  A)
  Photosynthesis done clear
  B)
  Chemosynthesis done clear
  C)
  Breakdown of organic compounds done clear
  D)
  Assimilation of nitrogen compounds done clear
  View Solution play_arrow

• question_answer46)
  One way cycle is [Pb. PMT 1999]
  A)
  \[C{{O}_{2}}\]cycle done clear
  B)
  \[{{H}_{2}}O\]cycle done clear
  C)
  Free energy cycle done clear
  D)
  \[{{O}_{2}}\]cycle done clear
  View Solution play_arrow

• question_answer47)
  Study of Biogeochemical cycles is called Biogeochemistry. Its father is Vernadsky (=Winodgsky). It involves [CBSE PMT 1999]
  A)
  Cycling of energy done clear
  B)
  Cycling of gases done clear
  C)
  Cycling of nutrients done clear
  D)
  Cycling of water done clear
  View Solution play_arrow

• question_answer48)
  Amount of nitrogen fixed electrochemically and photochemically is [Kerala 2000]
  A)
  \[140mg/{{m}^{2}}/yr\] done clear
  B)
  \[78mg/{{m}^{2}}/yr\] done clear
  C)
  \[35mg/{{m}^{2}}/yr\] done clear
  D)
  \[15mg/{{m}^{2}}/yr\] done clear
  E)
  \[350mg/{{m}^{2}}/yr\] done clear
  View Solution play_arrow

• question_answer49)
  Crystalline rocks are natural source of biogenetic element [Kerala 2000]
  A)
  Calcium done clear
  B)
  Phosphorus done clear
  C)
  Magnesium done clear
  D)
  Calcium done clear
  E)
  Sulphur done clear
  View Solution play_arrow

• question_answer50)
  Azotobacter and Clostridium are nitrogen fixing bacteria and found in [Haryana 2000]
  A)
  Nodulated roots done clear
  B)
  Leaves of certain plant done clear
  C)
  Free in soil done clear
  D)
  None of the above done clear
  View Solution play_arrow

• question_answer51)
  The limiting factor in nitrification of soil is [AIIMS 2000]
  A)
  pH done clear
  B)
  Temperature done clear
  C)
  Light done clear
  D)
  Air done clear
  View Solution play_arrow

• question_answer52)
  Biochemical cycle with gaseous phase is [DPMT 2001]
  A)
  Carbon done clear
  B)
  Sodium done clear
  C)
  Phosphorus done clear
  D)
  Magnesium done clear
  View Solution play_arrow

• question_answer53)
  Which one is sedimentary cycle [Kerala 2001]
  A)
  Oxygen cycle done clear
  B)
  Nitrogen cycle done clear
  C)
  Hydrogen cycle done clear
  D)
  Phosphorus cycle done clear
  E)
  Carbon cycle done clear
  View Solution play_arrow

• question_answer54)
  Nitrogen content of biosphere remains constant due to [AFMC 2001]
  A)
  Nitrogen fixation done clear
  B)
  Nitrogen cycle done clear
  C)
  Industrial pollution done clear
  D)
  Absorption of nitrogen done clear
  View Solution play_arrow

• question_answer55)
  Which of the following is present in maximum amount in atmosphere [DPMT 2002]
  A)
  Oxygen done clear
  B)
  Nitrogen done clear
  C)
  Carbon dioxide done clear
  D)
  Hydrogen done clear
  View Solution play_arrow

• question_answer56)
  Nitrates are transformed into nitrogen by [CPMT 2003]
  A)
  Ammonifying bacteria done clear
  B)
  Nitrifying bacteria done clear
  C)
  Denitrifying bacteria done clear
  D)
  Both a and b done clear
  View Solution play_arrow

• question_answer57)
  In the phosphorus cycle, phosphate becomes available by weathering of rocks first to [Pb. PMT 2004]
  A)
  Consumers done clear
  B)
  Producers done clear
  C)
  Decomposers done clear
  D)
  None of these done clear
  View Solution play_arrow