Metabolic pathways that make available raw materials from which other molecules can be synthesized and that provide chemical energy required for many cell activities are known as Catabolism.
Catabolism may be defined as the process by which the energy gained by the individual is synthesized within the body of the individual. An individual eats food which provides energy to the body. The vitamins, proteins and minerals present in the food items are broken down into simpler molecules as they are in the form of complex molecules. This breaking involves the release of energy. This energy is released in the form of small energy packets known as Adenosine triphosphate or ATP. Proteins are broken down into Amino acids, Polysaccharides into Monosaccharides, Nucleic acids into nucleotides and then nucleosides and fatty acids into lipids.
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