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Leg Hemoglobin

Leghaemoglobi...

Question

Leghaemoglobin in symbiotic nodules helps :

A

To provide energy to the growing symbionts

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B

In nitrogen reallocation between symbionts and plants

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C

By scavenging Oxygen

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D

To stabilize redox potential of host cells

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Solution

The correct option is A By scavenging Oxygen
Leghaemoglobin helps to mantain internal oxygen in symbiotic nodules, because this protein has ten times more affinity for oxygen as compared to blood pigment haemoglobin.Therefore they acts as oxygen scavenger.
So, the correct answer as 'by scavenging oxygen'

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

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

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

Q. Symbiotic nitrogen fixation is carried out in the nodules of leguminous plants by ..........

Q. Assertion [A]: Root nodules provide shelter to certain bacteria.
Reason [R]: Bacteria present in root nodules helps in fixing nitrogen for the plant.

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