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Assertion : Nitogen - fixing bacteria in...

Assertion : Nitogen - fixing bacteria in legume root nodules survive in oxygen - depleted cells of nodules.
Reason : Leghaemoglobin completely removes oxygen from the nodule cells.

A

Both A and R are true and R is the correct explanation of A

B

Both A and R are true, but R is not the correct explanation of A

C

A is true, but R is false

D

A and R are false

Text Solution

Verified by Experts

The correct Answer is:
B
Enzyme nitrogenase is sensitive to `O_(2)` and therefore, it is found in oxygen depleted cells. In the cells of root nodules leghaemogiobin is present and pigment is an oxygen scavenger.
Hence, it provides anaerobic condition to nitrogen fixing bacteria.
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