Photosynthesis Quiz

Last Updated By JanetMayorga on 11/19/2012
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C4 plants occur more commonly in desert conditions because _____.

Answer:
a)  they produce carbon dioxide internally via photorespiration
b)  they can fix carbon at the lower CO2 concentrations that develop when the stomata are closed
c)  the stomata open at night and close in the day
d)  they produce water as a product of their photosynthetic pathways
e)  they store carbon by incorporating Co2 into organic acids that are later catabolized
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    a)NADPH ---> chlorophyll ---> Calvin cycle
    b)H2O ---> photosystem I ---> photosystem II
    c)NADPH ---> O2 ---> CO2
    d)NADPH ---> electron transport chain ---> O2
    e)H2O ---> NADPH ---> Calvin cycle
    e)H2O ---> NADPH ---> Calvin cycle
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    a)Autotrophs, but not heterotrophs, can nourish themselves beginning with CO2 and other nutrients that are inorganic.
    b)Only heterotrophs have mitochondria.
    c)Cellular respiration is unique to heterotrophs.
    d)Only heterotrophs require chemical compounds from the environment.
    e)Only heterotrophs require oxygen.
    a)Only heterotrophs require oxygen.
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    Which of the following does not occur during the Calvin cycle?



    a)carbon fixation
    b)regeneration of the CO2 acceptor
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Question: C4 plants occur more commonly in desert conditions because _____.
Answer:
they produce carbon dioxide internally via photorespiration
they can fix carbon at the lower CO2 concentrations that develop when the stomata are closed
the stomata open at night and close in the day
they produce water as a product of their photosynthetic pathways
they store carbon by incorporating Co2 into organic acids that are later catabolized