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Question

Which of these element is necessary for the action of nitrate reductase?

A
Molybdenum
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B
Copper
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C
Zinc
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D
Iron
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Solution

The correct option is D Molybdenum
Nitrogen assimilation is carried out by sequential action of nitrate reductase and nitrite reductase. The absorbed nitrate is reduced by nitrate reductase into nitrite, which is then acted upon by nitrite reductase to give ammonia. Molybdenum is the mineral required for the activity of nitrate reductase.
So, the correct answer is 'Molybdenum'

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