Lipid | Definition, Structure, Examples, Functions, Types, & Facts
网页3 天之前 · Many of these molecular building blocks are similar, or homologous, in structure. The homologies allow lipids to be classified into a few major groups: fatty acids, fatty acid derivatives, cholesterol and its derivatives, and lipoproteins. This article covers the major groups and explains how these molecules function as energy-storage molecules ...
Lipids (article) | Macromolecules | Khan Academy
网页Overview of lipids, covering fats and oils, saturated and unsaturated fats, triglycerides (triacylglycerols), phospholipids, and steroids.
23.1: Structure and Classification of Lipids - Chemistry LibreTexts
网页Fats and oils, found in many of the foods we eat, belong to a class of biomolecules known as lipids. Gram for gram, they pack more than twice the caloric content of carbohydrates: the oxidation of fats and oils supplies about 9 kcal of energy for every gram oxidized, whereas the oxidation of carbohydrates supplies only 4 kcal/g.
Lipid - Wikipedia
网页Lipids may be broadly defined as hydrophobic or amphiphilic small molecules; the amphiphilic nature of some lipids allows them to form structures such as vesicles, multilamellar/ unilamellar liposomes, or membranes in an aqueous environment.
Section 3.6: Lipids - Biology LibreTexts
网页5 天之前 · The molecular structure of lipids results in unique behavior in aqueous environments. Figure \(\PageIndex{1}\) depicts the structure of a triglyceride. Because all three substituents on the glycerol backbone are long hydrocarbon chains, these compounds are nonpolar and not significantly attracted to polar water molecules—they are hydrophobic.
Lipid classification, structures and tools - PMC - National Center …
网页3. Lipid structures. Lipids display remarkable structural diversity, driven by factors such as variable chain length, a multitude of oxidative, reductive, substitutional and ring-forming biochemical transformations as well as modification with sugar residues and other functional groups of different biosynthetic origin.
10.2: Introduction to Lipid Structure - Chemistry LibreTexts
网页Cell membranes are composed of membrane lipids, which are diacylglycerols linked to a hydrophilic 'head group' on the third carbon of the glycerol backbone. The fatty acid chains can be of various lengths and degrees of saturation, and the two chains combined make up the hydrophobic 'tail' of each membrane lipid molecule.
15.6: Structure and Function - Lipids and Membranes
网页2021年11月15日 · Lipids are a diverse group of molecules that all share the characteristic that at least a portion of them is hydrophobic. Lipids play many roles in cells, including serving as energy storage (fats/…
Mammalian lipids: structure, synthesis and function - PMC
网页2021年11月2日 · Understanding lipid diversity, their synthesis and metabolism to generate signalling molecules will provide insight into the fundamental function of the cell. This review summarises the biosynthesis of the lipids of the mammalian cell; phospholipids, sphingolipids and cholesterol and how lipid diversity is achieved.
Lipids: Structure, Function and Examples - ThoughtCo
网页2020年2月4日 · Lipids serve a variety of important functions in living organisms. They act as chemical messengers, serve as valuable energy sources, provide insulation, and are the main components of membranes. Major lipid groups …
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