How is nitrogenase enzyme protected ? from Biology Mineral Nutrit

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Mineral Nutrition

One Word Answers

1. Which pigment is present in the root nodules of legumes ?

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2. Name the best known symbiotic nitrogen fixing bacterium.

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

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4. How is nitrogenase enzyme protected ?

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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5. What is Hidden hunger in the case of plants?

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6. Which kind of plants harbour nitrogen fixing bacteria in their root nodules ?

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7. When a section of root nodule of a legume is examined it appears pinkish. Why ?

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8. What is active absorption ?

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9. What are Chemoautotrophs ?

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10. Who discovered biological nitrogen fixation ?

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