A) Nif gene is responsible for biological nitrogen fixation, which directs the synthesis of nitrogenase enzyme.
B) Denitrification is the reduction of nitrate to gaseous compounds of nitrogen.
C) Removal of \[-N{{H}_{2}}\] group is called deamination, while that of \[-COOH\] group is called decarboxylation.
D) Chlorosis symptom is caused due to deficiency of nitrogen minerals.
Correct Answer: D
Solution :
The appearance of yellow colour due to destruction of chlorophyll is called chlorosis. This disease is caused due to deficiency of potassium mineral.
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