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Lipid as the non polymer macromolecule
"On Non-Polymer Macromolecules - Lipids"
Between heaven and earth, everything is complex. In the category of macromolecules, everyone polymerizes to form a chain-like structure. Only lipids are different, and they are the only non-polymer.
Polymers are mostly connected repeatedly by monomers through covalent bonds, forming a giant chain, like strands, weaving complex structures. Lipids, on the other hand, have unique structures and are not monomer polymerization. Although there are various types of lipids, such as triglycerides, phospholipids and sterols, they do not have the characteristics of polymers built from repeated monomers.
Triglycerides are formed by the combination of glycerol and fatty acids. Glycerol is a ternary alcohol, and fatty acids are composed of long-chain hydrocarbon groups and carboxyl groups. When the two meet, through esterification, the carboxyl group of the fatty acid and the hydroxyl group of the glycerol dehydrate and form an ester bond. However, this is not a monomer repeated polymerization mode. In each triglyceride molecule, the chain length and saturation of the fatty acid can be changed, showing a multi-state.
Phospholipids, on the basis of triglycerides, a fatty acid is replaced by phosphoric acid and nitrogen-containing compounds. Its hydrophilic head and hydrophobic tail endow it with unique amphiphilic properties, which are crucial for the construction of biological membranes. This structure is also not formed by the regular polymerization of monomers. Its unique chemical composition and spatial arrangement are the characteristics that distinguish lipids from polymers.
As for sterols, cyclopentane polyhydrophenanthrene is used as the basic skeleton, which is completely different from the chain-like form of polymers. Cholesterol, a typical sterol, is indispensable in animal cell membranes and regulates the fluidity of membranes. Its structure is compact, with a ring system as the core, it does not grow like a polymer.
In summary, lipids, with their unique structure, are free from the conventional paradigm of polymer macromolecules, and are unique in the stage of life chemistry. They deduce different wonders and contribute unique power to the diversity and order of life phenomena.
Between heaven and earth, everything is complex. In the category of macromolecules, everyone polymerizes to form a chain-like structure. Only lipids are different, and they are the only non-polymer.
Polymers are mostly connected repeatedly by monomers through covalent bonds, forming a giant chain, like strands, weaving complex structures. Lipids, on the other hand, have unique structures and are not monomer polymerization. Although there are various types of lipids, such as triglycerides, phospholipids and sterols, they do not have the characteristics of polymers built from repeated monomers.
Triglycerides are formed by the combination of glycerol and fatty acids. Glycerol is a ternary alcohol, and fatty acids are composed of long-chain hydrocarbon groups and carboxyl groups. When the two meet, through esterification, the carboxyl group of the fatty acid and the hydroxyl group of the glycerol dehydrate and form an ester bond. However, this is not a monomer repeated polymerization mode. In each triglyceride molecule, the chain length and saturation of the fatty acid can be changed, showing a multi-state.
Phospholipids, on the basis of triglycerides, a fatty acid is replaced by phosphoric acid and nitrogen-containing compounds. Its hydrophilic head and hydrophobic tail endow it with unique amphiphilic properties, which are crucial for the construction of biological membranes. This structure is also not formed by the regular polymerization of monomers. Its unique chemical composition and spatial arrangement are the characteristics that distinguish lipids from polymers.
As for sterols, cyclopentane polyhydrophenanthrene is used as the basic skeleton, which is completely different from the chain-like form of polymers. Cholesterol, a typical sterol, is indispensable in animal cell membranes and regulates the fluidity of membranes. Its structure is compact, with a ring system as the core, it does not grow like a polymer.
In summary, lipids, with their unique structure, are free from the conventional paradigm of polymer macromolecules, and are unique in the stage of life chemistry. They deduce different wonders and contribute unique power to the diversity and order of life phenomena.
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