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Mineral Nutrition

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Question

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Which pigment is present in the root nodules of legumes ?

Solution

Leghaemoglobin.

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Question

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Name the best known symbiotic nitrogen fixing bacterium.

Solution

Rhizobium.

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What type of condition is created by leghaemoglobin in the root modules of legumes ?

Solution

Anaerobic.

Question

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How is nitrogenase enzyme protected ?

Solution

The nitrogenase enzyme is very sensitive to the molecular oxygen. It requires anaerobic conditions to work. The leg-haemoglobin in the nodule acts as an oxygen scavenger just meainting the anaerobic condition needed by the enzyme.

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