UW-Madison BIOLOGY 151 - Macromolecules (2 pages)

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Macromolecules



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Macromolecules

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Macromolecules


Lecture number:
2
Pages:
2
Type:
Lecture Note
School:
University of Wisconsin, Madison
Course:
Biology 151 - Introductory Biology

Unformatted text preview:

Bio 151 1nd Edition Lecture 2 Outline of Last Lecture I Water II Bonds III Importance of water IV Polymers Monomers Current Lecture Carbohydrates composed of polysaccharides many sugars o Diversity comes from Linkages and extent of branching Starch vs cellulose o Monomers glucose 6 sugars o Linkages in starch are alpha form exposes OH functional groups o Linkages in cellulose are beta glucose monomers functional groups are flipped ribbons bundle rigid linear molecule Chitin polymer of N containing sugars used to make exoskeletons of insects Roles for carbohydrates o Structural cellulose plants chitin fungi animals o Energy starch glycogen Sugar names for monomers end in ose o Ei 5C ribose deoxyribose 6C glucose fructose galactose Lipids made up of glycerol and fatty acids to make a lipid glycerol backbone fatty acid non polar react together via dehydration reaction polar o Forms of lipids Fat glycerol 3 fatty acids triacylglycerol INCREDIBLY HYDROPHOBIC Phospholipids 2 fatty acids glycerol phosphate hydrophilic polar Duel nature hydrophilic head hydrophobic tail o In water assembles into micelle self assembles no energy heads out tails in These notes represent a detailed interpretation of the professor s lecture GradeBuddy is best used as a supplement to your own notes not as a substitute Proteins made up of monomers called amino acids amine carboxyl acid o Amino acids Chemical diversity comes from R groups 20 different R groups for amino acids Amino acids are connected by peptide bonds covalent bonds between groups o Levels of protein structure Primary structure sequence of amino acids Secondary structure interactions between amino acids close by Alpha helix Beta pleat sheet amino acids interact with another amino acid chain Tertiary structure 3D shape that alpha and beta assume interactions between different regions of the protein 3D shape Includes hydrophobic van der waals interacting ionic bonds disulfide bridge covalent bond between sulfides that form



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