BIO 309D S08 Lec2 - Announcements Read ch. 2 23-33 Bring I...

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Announcements Read ch. 2 23-33 Bring I clickers on wed For wed. read chapter 3, pgs 38-59. Discussions start Monday Homework #1 due monday
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Chemistry of Life Biomolecules
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Biomolecules Organic molecules (based on carbon) Contain carbon (and hydrogen) Macromolecules Large molecules built from smaller molecules 4 classes Carbohydrates - polymer = special class of macromolecules Proteins - polymer Nucleic acids - polymer lipids
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Biomolecules Most are polymers that are built from monomers Polymer: long molecules consisting of many similar building blocks (subunits) linked in a chain Monomer: small molecules (subunits) that are the building blocks of a polymer (will be similar to one another when building)
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Name the monomer Carbs: monosaccharides (sugars) Proteins: amino acids Nucleic acids: nucleotides
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Making and Breaking Polymers Chemical mechanisms used to make and break polymers are basically the same for all macromolecules
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Making Polymers Subunits (monomers) are joined together to build larger molecules (polymers) through Dehydration synthesis Join together subunits with the loss of a water molecule Need 2 hydrogens and 1 oxygen
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Breaking Polymers Larger molecules )polymers) are broken into subunits (monomers) through Hydrolysis (to break with water) Break apart subunits with the addition of a water molecule
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Carbohydrates Functions Provide energy to cells (primary energy source) Structural roles (provide support for cells) Communication (bwtn cells. Ex: cell-cell recognition) Structure General formula: CH 2 O (where carbs get their name - hydrated carbon) Monosaccharides Disaccharides polysaccharides
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Monosaccharides Single sugars Monomer subunit of carbohydrates 3-6 carbons Examples Glucose (main energy source for cells) Fructose Ribose (Rna) Deoxyribose (Dna)
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Glucose (C 6 H 12 O 6 ) Sugar is hydrophillic
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Disaccharides Double sugars 2 monosaccharides covalently bonded to each other Examples: Sucrose *table sugar*(glucose + fructose) Maltose *used in beer!*(glucose + glucose) Lactose (glucose + galactose)
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Sucrose (C 12 H 22 O 11 )
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Polysaccharides Complex carbohydrates Many monosaccharides covalently bonded in long
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This note was uploaded on 03/25/2008 for the course BIO 309D taught by Professor Jessicawandelt during the Spring '08 term at University of Texas at Austin.

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BIO 309D S08 Lec2 - Announcements Read ch. 2 23-33 Bring I...

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