HORTICULTURE

HORTICULTURE SCIENCE

CROP PHYSIOLOGY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
The first stable product of fixation of atmospheric nitrogen in leguminous plants is?
A
NO3-
B
Glutamate
C
Ammonia
D
NO2-
Explanation: 

Detailed explanation-1: -The first stable product of fixation of atmospheric nitrogen in leguminous plants is ammonia. This is catalysed by enzyme nitrogenase.

Detailed explanation-2: -Biological nitrogen fixation (BNF) occurs when atmospheric nitrogen is converted to ammonia by a nitrogenase enzyme.

Detailed explanation-3: -The nitrogen produces diimide (N2H2), hydrazine (N2H4) and then ammonia, which is the stable product. Thus, the correct answer is option (B), ‘Ammonia’.

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