Metabolism (उपापचय)



 Definition  

Metabolism is the set of life-sustaining chemical reactions in organisms.

The three main purposes of metabolism are: –👇



(1) The conversion of food to energy to run cellular processes.

(2) The conversion of food/fuel to building blocks for proteins, lipids, nucleic acids, and some carbohydrates.


(3)
 And the elimination of nitrogenous wastes.




 About Metabolism -:👇



◆ These Enzyme-catalyzed reactions allow organisms to grow and reproduce, maintain their structures, and respond to their environments. 


The word metabolism can also refer to the sum of all chemical reactions that occur in living organisms, including digestion and the transport of substances into and between different cells.



The metabolic system of a particular organism determines which substances it will find nutritious and which poisonous.

For example-

some prokaryotes use hydrogen sulfide as a nutrient, yet this gas is poisonous to animals.


 Metabolic reactions may be categorized as  👇


Catabolic( अपचयी)-:

The breaking down of compounds (for example, the breaking down of glucose to pyruvate by cellular respiration);


Anabolic (उपचयी)-:

The building up (synthesis) of compounds (such as proteins, carbohydrates, lipids, and nucleic acids).



Important

Usually, catabolism releases energy,

◆anabolism consumes energy.

◆The basal metabolic rate of an organism is the measure of the amount of energy consumed by all of these chemical reactions.






Categories: Biology

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