BIOL 2051 Exam 3 – Luzan Questions
and Answers.
what is carbon cycled through - Answer land, oceans, freshwater, sediments, rocks, and
biomass
nitrogen cycle - Answer links particularly strongly to carbon cycle because other than water
(H2O), Carbon and _ make up the bulk of living organisms
important perimeters in understanding the cycling of elements - Answer reservoir size and
turnover
percent of total: rocks and sediments reservoirs on Earth - Answer 99.5
percent of total: ocean reservoirs on Earth - Answer 0.05
percent of total: methane hydrate reservoirs on Earth - Answer 0.014
percent of total: fossil fuels reservoirs on Earth - Answer 0.006
percent of total: terrestrial biosphere reservoirs on Earth - Answer 0.003
percent of total: aquatic biosphere reservoirs on Earth - Answer 0.000002
most rapidly transferred carbon reservoir - Answer CO2 in the atmosphere
How is CO2 removed from the atmosphere? - Answer photosynthetic land plants and marine
microbes
redox cycle - Answer photosynthesis and respiration are apart of which cycle
photosynthesis - Answer reduces inorganic carbon dioxide to organic carbohydrates
CO2+H2O->(CH2O)+O2
respiration - Answer oxidizes organic carbohydrates to inorganic carbon dioxide
(CH2O)+O2->CO2+H2O
, CH4 & CO2 - Answer two major end products of decomposition
CH4 - Answer potent green house gas
produced in anoxic (oxygen free) environments
methanotrophs - Answer most methane converted to carbon dioxide by
methanogenesis - Answer central to carbon cycling in anoxic environments
methane in carbon decomposition - Answer number 1 carbon decomposition end product in
anoxic environment
how is methane formed - Answer (no oxygen) uses monomers (glucose) which are
fermented with production of H2 and CO2 and organic acids like acetate
*lots of energy locked within those compounds
methanogens evolved to do what - Answer extract energy from what is locked in compounds
that form methane
use CO2 as terminal electron acceptor, reducing CO2 to CH4 with H2 as electron donor
syntrophs - Answer methanogens team up with __ that supply them with necessary
substrates (like acetate)
nitrogen cycle is - Answer key constituent of cells
exists in number of oxidation states
nitrification - Answer nitrosomonas, nitrobacter, comammox (Nitrospira species),
Nitrosopumilus (Archaea)
NH4+->NO3-
NH4+->NO2-
NO2-->NO3-
dentrification - Answer bacillus bacterium, Paracoccus, Pseudomonas
NO3-->N2
and Answers.
what is carbon cycled through - Answer land, oceans, freshwater, sediments, rocks, and
biomass
nitrogen cycle - Answer links particularly strongly to carbon cycle because other than water
(H2O), Carbon and _ make up the bulk of living organisms
important perimeters in understanding the cycling of elements - Answer reservoir size and
turnover
percent of total: rocks and sediments reservoirs on Earth - Answer 99.5
percent of total: ocean reservoirs on Earth - Answer 0.05
percent of total: methane hydrate reservoirs on Earth - Answer 0.014
percent of total: fossil fuels reservoirs on Earth - Answer 0.006
percent of total: terrestrial biosphere reservoirs on Earth - Answer 0.003
percent of total: aquatic biosphere reservoirs on Earth - Answer 0.000002
most rapidly transferred carbon reservoir - Answer CO2 in the atmosphere
How is CO2 removed from the atmosphere? - Answer photosynthetic land plants and marine
microbes
redox cycle - Answer photosynthesis and respiration are apart of which cycle
photosynthesis - Answer reduces inorganic carbon dioxide to organic carbohydrates
CO2+H2O->(CH2O)+O2
respiration - Answer oxidizes organic carbohydrates to inorganic carbon dioxide
(CH2O)+O2->CO2+H2O
, CH4 & CO2 - Answer two major end products of decomposition
CH4 - Answer potent green house gas
produced in anoxic (oxygen free) environments
methanotrophs - Answer most methane converted to carbon dioxide by
methanogenesis - Answer central to carbon cycling in anoxic environments
methane in carbon decomposition - Answer number 1 carbon decomposition end product in
anoxic environment
how is methane formed - Answer (no oxygen) uses monomers (glucose) which are
fermented with production of H2 and CO2 and organic acids like acetate
*lots of energy locked within those compounds
methanogens evolved to do what - Answer extract energy from what is locked in compounds
that form methane
use CO2 as terminal electron acceptor, reducing CO2 to CH4 with H2 as electron donor
syntrophs - Answer methanogens team up with __ that supply them with necessary
substrates (like acetate)
nitrogen cycle is - Answer key constituent of cells
exists in number of oxidation states
nitrification - Answer nitrosomonas, nitrobacter, comammox (Nitrospira species),
Nitrosopumilus (Archaea)
NH4+->NO3-
NH4+->NO2-
NO2-->NO3-
dentrification - Answer bacillus bacterium, Paracoccus, Pseudomonas
NO3-->N2
