NEET Biology question

Not in NEET syllabus

**Assertion:** The nitrogen-fixing enzyme in legume root nodules functions at low oxygen concentration. **Reason:** Low oxygen concentration is provided by leghaemoglobin.

(A)Assertion is True, Reason is True; Reason is the correct explanation for AssertionCorrect
(B)Assertion is True, Reason is True; Reason is not the correct explanation for Assertion
(C)Assertion is True, Reason is False
(D)Assertion is False, Reason is True

Answer: (A)

Solution

Nitrogenase, the nitrogen-fixing enzyme, is rapidly inactivated by oxygen and therefore functions only under low-oxygen (near-anaerobic) conditions, making the Assertion true. This low-oxygen microenvironment within the nodule is

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Question ID VK-112780