ï»¿ Write short notes on : (a)Â Reductive amination (b)Â Transamination. from Biology Mineral Nutrition Class 11 Assam Board

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Write short notes on :

(a)Â Reductive amination

(b)Â Transamination.

(a) Reductive amination. In this process ammonia reacts with -Ketoglutaric acid and forms glutamic acid as indicated below :Â

(b) Transamination. This process involves the transfer of amino groups from one amino acid to the keto group of a keto acid. Glutamic acid is the main amino acid from which the transfer of NH2 group takes place and theÂ other 17 amino acids are formed through transamination. The enzyme required for such raction is called transaminase.

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

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

Leghaemoglobin.
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Name the best known symbiotic nitrogen fixing bacterium.

Rhizobium.
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