PPT-Lipids are hydrophobic, nonpolar organic molecules.

They are insoluble in water and highly soluble in one or more of the following solvents ether chloroform benzene and acetone Make up about 5 from organic substances which enter in the structure of living cell . Lipids are….. It can be defined as . nonpolar. organic compound insoluble in polar solvent , but . soluble in organic solvents. such as benzene ,ether, . chloroform.. Biological role of lipids. :. . 2003-2004. Lipids. 2003-2004. Large biomolecules that are made mostly of carbon and hydrogen with a small amount of oxygen (sometimes Phosphorous).. Lipids . Monomer subunits . Glycerol and 3 fatty acids. Lipids are relatively insoluble in water.. They are soluble in . nonpolar. solvents such as chloroform , diethyl ether, acetone, benzene and ether.. The hydrophobic (water hating) nature of lipids is due to the predominance of hydrocarbon chain.(-CH2-CH2-CH2-) in their structure. Dr. Huda Hania. Lipid chemistry . Lipid chemistry . Definition . Fats and Oils (triglyceride) . Waxes. Steroids. Fat- soluble vitamins. Phospholipid. Mono- di glycerides . Lipid compounds including: . Fats and Oils. Classification of Nutrients. Carbohydrates. Lipids. – . 9 calories per gram. Protein. Vitamins. Minerals. Water. LIPIDS. Most . concentrated. source of food energy. Provide . Nature’s flavor enhancer. lipids vs carbohydrates. - . both . Contain: carbon. , hydrogen, and . oxygen. LIPIDS do not:. dissolve in water. provide structure to food products. lipids. Food Examples: . Vocabulary. Soluble/miscible- will dissolve in a solvent. Insoluble/immiscible- will not dissolve in a solvent. ~Both of these terms require a solvent. For example vitamin A is a fat soluble vitamin, meaning it will dissolve in oils (fat). Must: Be able to explain the terms hydrophilic and hydrophobic. Should: Be able to compare the properties of methane and water. Could: Be able to explain the differences in the properties of methane and water. amphiphilic. lipids in water. Polar head groups. Hydrophobic tails. The shape of the lipid determines the structural features of the . aggregate. P. acking at bilayer edges is crowded, so bilayers merge their edges to form vesicles. 10/15/09. Nucleic Acids. Large, complex organic molecules that store and transfer genetic information in the cell. Two major types: Deoxyribonucleic acid (DNA) and ribonucleic acid (RNA). DNA contains information that determines characteristics of an organism and directs its cell activities. Cholesterol. Rich in hydrocarbon. Polar group (usually small). Oleic acid. Lipids serve a wide variety of functions. Vitamin K. Surfactants. Protection. Membrane. components. Insulation. Energy storage. Initial adsorption of the micelle to the membrane (left panel). A snapshot of the micelle-membrane complex at the beginning of fusion that has hydrophobic molecules present in the contact region (middle panel). A snapshot of a stalk structure (right panel). Stalk formation is the irreversible step in fusion. . hydration shells — the layers of water mol - ecules that surround the solutes — have been a topic of debate for almost 70 years. On page582 of this issue, Davis etal present an inv he tendency of many hydrophobic compounds to not mix with polar solvents. For example, benzene and formamid do not want to mix and neither do hexane and ethylene glycol. The main reason for this is pr