Question

Which of the following gene is responsible for biological nitrogen-fixation?

• A. Nitrogenase
• B. Nif gene
• C. RNA synthetase
• D. Yeast alanine tRNA synthetase

Answer 1

Answer: (B)

Nif gene

Nif genes are the nitrogen-fixing gene which encodes for proteins that are involved in nitrogen fixation. Nitrogenase complex is the primary enzyme which is encoded by nif genes. It also encodes the regulatory protein involved in the nitrogen fixation. It is found in both free-living and symbiotic nitrogen fixers. The gene is inserted to plant which are deficient by the technique of nif gene cloning.

So, the correct answer is option B.