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by: Zoe Lipner
Zoe Lipner

Biology of Nutrition & Health

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About this Document

Notes from 9/11/14
Biology of Nutrition & Health
One Day of Notes
25 ?




Popular in Biology of Nutrition & Health

Popular in Biosystem Engineering

This 3 page One Day of Notes was uploaded by Zoe Lipner on Wednesday September 17, 2014. The One Day of Notes belongs to 1005 at George Washington University taught by Scully in Fall2014. Since its upload, it has received 73 views. For similar materials see Biology of Nutrition & Health in Biosystem Engineering at George Washington University.


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Date Created: 09/17/14
Proteins 91714 509 PM Proteins What do proteins do o Storage last resort for energy Structure allow cells to latch onto one another Transport transport lipids HDL amp LDL Catalysis cause reactions to happen Defense antibodies Communication plasma membrane auto immune diseases hormones OOOOO Proteins Are Built from Amino Acids All proteins are built from monomers called amino acids 20 different amino acids Each amino acid has different properties Polypeptides protein o Name originates from the bond btwn the amino acids peptide bond Structure of Proteins The sequence of amino acids Overall 3D structure tertiary structure Not just a string Folding function A Protein Must Be Correctly Folded to be Functional Certain proteins need more than one string of amino acids to be func onal Hemoglobin 0 2 string of alpha protein o 2 string of beta protein Denaturation Destruction of a protein39s 3D shape resulting in a loss of protein activity Extreme temperatures pH and salt concentration can cause denaturation of protein Nutrition Malnourishment o Not getting all of the correct necessary nutrients calories Overnourishment o Too many calories Undernourishment o Too few calories Undernourished malnourished Must consume 8 out of 20 amino acids to be considered nourished Lipids Fatty acids o Fatty acids in which all the carbon atoms in the hydrocarbon chain are linked wa single covalent bond are called saturated fatty acids o Fatty acids in which one or more carbon atoms in the hydrocarbon chain are linked by a double bond are called unsaturated fatty acids Phospholipids o Phospholipids are made up of 2 hydrophobic fatty acid tails bonded to a hydrophilic head consisting of a glycerol and a phosphate group Sterols Animals Store Surplus Energy as Triglycerides 3 fatty acid molecules bonded to a glycerol molecule make up a triglyceride Triglycerides built from saturated fatty acids are known as fa amp are solid at room temperature Triglycerides built from unsaturated fatty acids tend to be liquid at room temperature amp are called E Animals Store Surplus Energy as Triglycerides Energy can be sorted in the form of triglycerides deposited in the cytoplasm of cells Lipids contain more than twice the energy of protein or carbohydrates of the same volume For every gram of fat you get 9 energies


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