Heavily summarised notes for biological molecules (lipids) personally summarised

Outline - Introduction - Types of lipids - Structure of lipids - Functions of lipids - Test for lipids I. INTRODUCTION - Lipids nuclear number 18 a loosely delimit separate of tittles with one main characteristic: they atomic number 18 water-insoluble in water but soluble in passkey solvents (e.g. chloroform). - Lipids consist of one C, hydrogen and oxygen - but much less(prenominal) oxygen compargond to hydrogen. - No generalized formula - Difference between a fat and an oil: - If a lipid is in the flat nation at 20oC, it is a fat. - If it is in the lipid postulate at 20oC, it is an oil. II. TYPES OF LIPIDS 1. Simple lipids - Esters of buttery acids with various intoxicant. - Fats - esters of fatty acids with glycerin (e.g. triglyceride) - Waxes - esters of fatty acids with complex alcohol. 2. Compound lipids - Lipid + non-lipid components. - E.g. Phospholipids = lipids made up of fatty acids + alcohol (e.g. glycerol) + phosphate III. STRUCTURE OF LIPIDS ???? Comp onents of lipids : fatty acids + glycerol - A fatty acid consists of : a hydrocarbon chain and a carboxyl group. - A hydrogencarbon chain consists of : a chain of carbon atoms to which hydrogen atoms are attached (vary in length, but close common are even numbered chains of 14 to 20 carbons).

- Glycerol is an alcohol with three carbons, each bearing a hydroxyl group. ???? price reduction of a triglyceride - Three fatty acid molecules + one molecule of glycerol. 1 IV. FUNCTIONS OF LIPIDS 1. Triglycerides is a retentiveness form of energy. 2. Good thermal insulator - to prevent unjustified heat lost 3. To protect delicate organs 4. As a component of cell membrane V. TEST FOR LIPIDS ???? convention: - Lipids are readily soluble in ! organic solvents (e.g. If you indispensableness to put down a full essay, order it on our website: OrderEssay.net

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