Biology·MCQ Practice

Nitrogen Metabolism — MCQ Practice

NEET UG

Version 1Updated 21 Mar 2026

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Test your knowledge. Click “Solve” to reveal options, select your answer, then check the result. 6 questions available.

Q1medium

Which of the following statements about biological nitrogen fixation is INCORRECT?

Q2easy

Which of the following pairs of bacteria are involved in the two sequential steps of nitrification?

Q3easy

Which enzyme is responsible for the reduction of nitrate to nitrite in plant cells?

Q4medium

The conversion of ammonia to glutamate by reductive amination involves which of the following keto acids?

Q5easy

Which of the following is NOT a free-living nitrogen-fixing bacterium?

Q6easy

Which of the following processes returns nitrogen gas ( $N_2$ ) to the atmosphere, completing the nitrogen cycle?