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chapters 5-7
exam 2
6
Biology
Undergraduate 1
10/13/2013

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Term
hydrophilic regions
Definition
The phosphorus-containing "head" of a phospholipid is electrically charged and therefore associates with polar water molecules
Term
Hydrophobic regions
Definition
the long, non polar fatty acid "tails" of a phospholipid associate with other nonpolar materials, but they do not dissolve in water or associate with hydrophilic substances
Term
Peripheral membrane proteins
Definition
lack exposed hydrophobic groups and are not embedded in the bilayer. instead, they have polar or charged regions that interact with exposed parts of integral membrane proteins, or with the polar heads of phospholipid molecules
Term
integral membrane proteins
Definition
at least partly embedded in the phospholipid bilayer. like phospholipids, these proteins have both hydrophillic and hydrophobic regions
Term
glycolipid
Definition
consists of a carbohydrate covalently bonded to a lipid. extending outside the cell surface, the carbohydrate may serve as a recognition signal for interactions between cells
Term
glycoprotein
Definition
consists of a carbohydrate covalently bonded to a protein. the bound carbohydrate is an oligosaccharide of 15 fewer monosaccaride units. these oligosaccharides often function as signaling sites, as do the carbohydrates attached glycolipids
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