Legume root nodules contain leg hemoglobin. Its function is to regulate _________________.

Expression of nif genes

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Dinitrogenase activity

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Oxygen supply

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Nodule growth

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Solution

The correct option is C Oxygen supply
Correct option is C.

Leghemoglobin is found in the legume root nodules which is produced as a result of symbiotic association between the bacteroid and plant. The leghemoglobin protects the nitrogenase enzyme from denaturation from oxygen, and supplies this oxygen to the root nodule bacteria for respiration.

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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. In root nodules of legumes, leg-haemoglobin is important because it

Q. What type of condition is created by leghaemoglobin in the root nodule of a legume?

Q. Assertion (A) : Legumes revive the soil fertility.
Reason (R) : Microbes in the root nodules of legumes fix the atmospheric nitrogen.

The correct sequence of events related to nodule formation of legumes is

A. Formation of bacteroids

B. Growth of infection thread

C. Secretion of sugars, amino acids and flavonoids by roots

D. Chemotactic movement of Rhizobia towards legume roots

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