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Nitrogen Fixation and Photosynthesis

Nitrogen Fixation and Photosynthesis
The chief source of nitrogen for green plants is

low molecular weight- organic nitrogenous compound
ammonium salts
atmospheric nitrogen
nitrates

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Nitrogen Fixation and Photosynthesis
Which of the following bacteria genus is capable of oxidizing ammonia (NH4)?

Nitrosobacter
Nitrobacter
Nitrosococcus
Nitrospina

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Nitrogen Fixation and Photosynthesis
Which of the following molecule is produced from the fixation of CO2 in C4 plants?

Malate
Oxaloacetate
Alpha-ketoglutarate
Pyruvate

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Nitrogen Fixation and Photosynthesis
Plants absorb nitrates from soil and convert them into

urea
ammonia
none of these
nitrogen

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Nitrogen Fixation and Photosynthesis
Chlorophyll is associated with

stroma
matrix
cristae
thylakoids

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Nitrogen Fixation and Photosynthesis
During nitrogen fixation the enzyme nitrogenase catalyse the reaction. The reaction is high energy demanding which require approximately

12 ATP
25 ATP
7 ATP
18 ATP

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