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Question

In the higher plants, nitrate ions absorbed from the soil are converted to ammonia in two steps. In the second step, the electrons required for reduction of nitrite ions are donated by


A
Cytochrome P450
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B
Nitrate reductase
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C
Ferredoxin
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D
Nitrite reductase
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Solution

The correct option is D Ferredoxin
Nitrate assimilation is the process, by which the absorbed nitrate is reduced by an inducible enzyme nitrate reductase with the help of reduced coenzymes into nitrite. Nitrite is further reduced by enzyme nitrite reductase with the help of reduced coenzymes and ferredoxin, into ammonia. Ferredoxin supplies electrons one by one for this reduction.
so, the correct answer is 'Ferredoxin'

Biology

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