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Nitrogen Fixation and Photosynthesis

Nitrogen Fixation and Photosynthesis
Nitrosomonous and Nitrobacter obtain their carbon for growth from

organic compounds
elementary carbon
none of these
carbon dioxide

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Nitrogen Fixation and Photosynthesis
What is the metal ligand in chlorophylls?

Copper (Cu)
Magnesium (Mg)
Manganese (Mn)
Iron (Fe)

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Nitrogen Fixation and Photosynthesis
In the presence of carbon monoxide, nitrogen fixation

increases
none of these
inhibits
decreases

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

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

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Nitrogen Fixation and Photosynthesis
A group of about 300 chlorophyll molecule acting together to trap photons and transfer energy to the pigment molecule at the reaction center may be called as

harvesting unit
reaction center
photosynthetic unit
chloromass

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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

7 ATP
12 ATP
25 ATP
18 ATP

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