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Mineral Nutrition

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CBSE Gujarat Board Haryana Board

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Class 10 Class 12

Which of the following statements are true? If false, correct them.
1. Boron deficiency leads to stout axis.
2. Every mineral element that is present in the cell is needed by cell.
3. Nitrogen as a nutrient is highly immobile in the plants.
4. It is very easy to establish the essentiality of micronutrients, because they are required in traces.

1. True. Boron deficiency leads to stout axis.

2. False. Every mineral element present in the cell is not needed by the plant.

3. False. Nitrogen is highly mobile.

4. False. It is very difficult to establish essentiality of micronutrients because they are required in traces.


Which pigment is present in the root nodules of legumes ?


What is Hidden hunger in the case of plants?

Hidden hunger refers to a situation in which a crop needs more of a given nutrient yet has shown no deficiency symptoms. The nutrient content is above the deficiency symptom zone but still considerably needed for optimum crop production

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.

Name the best known symbiotic nitrogen fixing bacterium.


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