Lecture 4- Larger Biological Molecules A

Amylose unbranched helical structure 2 amylopectin

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Unformatted text preview: from glycogen Structural polysaccharides Cellulose •________monomers •different arrangement than in starch •form straight molecules Structural polysaccharides Cellulose Structural polysaccharides What makes cellulose tough to digest? Structural polysaccharides Digestion of cellulose •_______ hydrolyses β glucose linkages •Made by microbessymbiotic in guts of cows and other ruminants Structural polysaccharides Chitin : Structural polysaccharide of arthropods and fungi Contains________ Biological macromolecules Carbohydrates Lipids Proteins Nucleic acids • • • • • • Lipids Little to no affinity to water Hydrophobic (doesnt like water) Non-polar bonds Do not form polymers store energy Formed by dehydration Lipids: glycerol H H-C-OH H-C-OH H-C-OH H Lipids: fatty acids Fatty acid (palmitic acid) Lipids: fatty acids ◦Long hydrocarbon skeleton ◦16-18 Cs ◦C-H non polar. Hydrophobic (doesnt like water) ◦Carboxyl at one end ◦Carboxyl can take part in dehydration rxn---> ester linkage( type of bond that hold fatty acid to a glycerol) Lipids: triacylglycerols Lipids: fats Refers to 3 ester linkage Lipids: fats Triacylglycerols Three fatty acids linked to one gylcerol Lipids: fats Types of lipids •Saturated/Unsaturated (poly-unsaturated) •Phospholipids •Steroids Saturated has no double bonds. ◦Have maximum amount of H Unsaturated has one more double bonds ◦ Polyunsaturated ◦Minimum amount of H Double bonds add kinks (asymmetry) Types of lipids Types of lipids Saturated fatty acids Types of lipid...
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