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8.Microbes in Human Welfare
medium
Assertion : Nitrogen-fixing enzyme in legume root nodules function at low oxygen concentration.
Reason : Low oxygen concentration is provided by leghaemoglobin.
A
If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.
B
If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.
C
If the Assertion is correct but Reason is incorrect.
D
If both the Assertion and Reason are incorrect.
(AIIMS-2004)
Solution
Leghaemoglobin is the oxygen scavenger and it protects nitrogen fixing enzyme nitrogenase from oxygen.
Standard 12
Biology
