KVPY SX SB Exam 2013 Question Paper

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Question : 76 of 120

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Which one of the following statements about nitrogenase is correct?

It is sensitive to $CO_2$ and therefore present in isolated nodules.
It requires $O_2$ and therefore functional during the day.
It is sensitive to $O_2$ and therefore is functional in anaerobic environments.
It is sensitive to light and therefore functions only in dark.

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