Lab 3 - Final Presentation

Lab 3 - Final Presentation - Biol 111 Section: xyz TA:...

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Biol 111 Section: xyz TA: Krishna C. Develpally Office Hours:   319 Held         Ph No.: 979 845  4653 Email: kdevelpally@mail.bio.tamu.edu Monday: 6:00 PM – 7:00 PM Tuesday: 6:00 PM – 7:00 PM Sign in!!! Please sign in before settling  down
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Biomolecules Lab Manual  Pg - 27
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Lab Safety Biol 111 Week 3 Goggles and close-toed shoes are  required.  Gloves are required –  Some of the  materials  such Ninhydrin and Ninhydrin- collidine are  corrosive!   Other chemicals  are  flammable! No food and drink in class. Cell phones must be either silenced or  switched off  Place acid (pH>7) and base (pH<7)waste  in appropriate containers. 
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Lab Safety Biol 111 Week - 3 Monitor all hot plates. Turn off when not in  use and use hand protectors when handling  hot beakers. Keep all solvents away from  heat sources!  Chromatography solvents are highly toxic  and volatile. Keep solvent containers tightly  closed and away from heat. Dispose chromatography solvent, ethanol  and Sudan IV in solvent waste container.  Dispose Lugol’s solution, Benedict’s reagent  and Biuret’s reagent in base waste container. 
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Objectives Describe the functions of major classes of  biomolecules.  Compare different bonds that help define  major classes of biomolecules Use reagents to identify biomolecules. Design and present an experiment to test  for the presence of biomolecules in food  materials. 
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Organic Molecules Organic refers to the carbon skeleton seen  in all molecules.   Living things contain carbon.  Carbon bonds with other elements such as  H, O and N to form various biomolecules. 
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Classes of Molecules Carbohydrates Lipids Proteins Nucleic Acids
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What makes them different? Functional groups Functional group behavior with respect to  the organic molecule.  Ex: Hydroxyl, Carbonyl, Carboxyl, Amino  etc.,  Carbonyl
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Hydroxyl Found in alcohols, sugars, etc… Improve the solubility of organic molecules OH
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Carbonyl –double bonded O Two types –aldehyde and ketone One or the other on every monosaccharide
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Carboxyl  - double bonded O and  hydroxyl In fatty acids AND amino acids Acts as an acid
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Amino In every amino acid Nitrogen atom attached to two hydrogen  atoms 
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This note was uploaded on 09/14/2008 for the course BIOL 111 taught by Professor Rizzo during the Fall '07 term at Texas A&M.

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Lab 3 - Final Presentation - Biol 111 Section: xyz TA:...

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