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Assertion : Nitrogen fixing enzyme in le...

Assertion : Nitrogen fixing enzyme in legume root nodules function at low oxygen concentration.
Reason : Low oxygen concentration is provided by leghaemoglobin.

A

if both are true with reason being correct explanation

B

both are true but reason is not correct explanation

C

assertion is true but reason is wrong

D

both are wrong

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The correct Answer is:
A
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Nitrogen fixing enzyme in root nodule is

Nitrogen fixing enzyme in root nodule is

Assertion: Nitrogen-fixing bacteria of legume nodules live in O_2 depleted cells. Reason: Leghaemoglobin completely removes O_2 from the nodule cells.

Assertion : Nitrogenase enzyme gets inactivated in presence of oxygen yet N_(2) fixation occurs in aerobic cells of legume nodules. Reason : Laghaemoglobin allows presence of oxygen just sufficient for cellular respiration only.

Assertion : Nitrogen is less reactive than molecular oxygen. Reason: Bond length of N_(2) is shorter than that of oxygen.

Assertion : Nitrogen is less reactive than molecular oxygen. Reason: Bond length of N_(2) is shorter than that of oxygen.

The function of leghaemoglobin in the root nodules of legumes is

Assertion : The role of oxygen in the regulation of respiratory rhythm is quite insignificant. Reason : Increased PCO_(2) and H^(+) concentration inputs from chemoreceptors can activate respirotory rhytm centre to make necessary adjustments.

A red pigment leghaemoglobin in root nodules a legumes is helpful in nitrogen fixation by :

Assertion: Effusion rate of oxygen is smaller than nitrogen. Reason: Molecular size of nitrogen is smaller than oxygen.

DINESH PUBLICATION ENGLISH-MICROBES IN HUMAN WELFARE-RQ
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  3. Assertion : Nitrogen fixing enzyme in legume root nodules function at ...

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  4. A red pigment present in the root nodules of leguminous plants is know...

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