Leghaemoglobin functions as

oxygen scavenger

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nitrogen scavenger

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carbon dioxide scavenger

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hydrogen carrier

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Solution

The correct option is A oxygen scavenger
Leghaemoglobin is an oxygen carrier protein which is found in the nitrogen-fixing root nodules of a leguminous plant. It is produced by the legumes in response to roots being colonized by nitrogen-fixing bacteria as a part of symbiotic interaction between plant and bacterium.

Nitrogenase enzyme is highly sensitive to molecular oxygen and becomes non-operational in aerobic conditions. Leghaemoglobin protects this enzyme by providing it with anaerobic conditions to function properly.

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Similar questions

Assertion (A) Nitrogen-fixing enzyme in legume root nodules functions at low oxygen concentration.
Reason (R) Low oxygen concentration is provided by leghaemoglobin.

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

The main function of ___ is to take in oxygen and give out carbon dioxide.

Q. Which of the following represents photosynthesis?
(a) water + oxygen----> carbon dioxide + carbohydrate
(b) carbon dioxide + water---->oxygen + carbohydrate
(c) carbohydrate + oxygen---> water + oxygen
(d) carbon dioxide + oxygen---> water + carbohydrate

Q. Assertion :Nitrogen fixing bacteria of legume nodule live in oxygen depleted cells. Reason: Leghaemoglobin completely removes oxygen from nodule cells.

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