The enzyme that becomes inactive if Leg Haemoglobin is removed from the Leguminous plant is ----

Nitrate reductase

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Transaminase

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Nitrogenase

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Amylase

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Solution

The correct option is C
Nitrogenase

In leguminous plants the presence of oxygen in the root nodules would reduce the activity of the oxygen-sensitive nitrogenase - an enzyme responsible for the fixation of atmospheric nitrogen. Leghemoglobin buffers the concentration of free oxygen in the cytoplasm of infected plant cells to ensure the proper function of root nodules.

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