ï»¿  Comment upon active absorption of minerals. from Biology Mineral Nutrition Class 11 Assam Board

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Comment upon active absorption of minerals.

Active absorption of minerals is the transportation of mineral against its concentration gradient by the use of energy in the form of ATP molecules. The entry or exit of ions to and from the symplast requires requires energy. The inward movement of the ions are called influx and the outward movement is called efflux.
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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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What type of condition is created by leghaemoglobin in the root modules of legumes ?

Anaerobic.
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Name the best known symbiotic nitrogen fixing bacterium.

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

Leghaemoglobin.
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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
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