lecture 4

lecture 4 - Lecture 4 Biological Organic Molecules A....

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1 Lecture 4 Biological Organic Molecules A. Organic Molecules Why carbon? Functional Groups Composed of subunits – “Building Blocks”. B. Major Biological Molecules Carbohydrates Lipids Proteins Nucleic Acids Self-Tests A bond formed by sharing electrons in the outermost shell. Covalent bond A bond formed by the gain or loss of electrons from the outer electron shell. Ionic bond Self-Tests A weak bond formed, for example, by the slight positive charge at the hydrogen end of the water molecule reacting with the negative end of other molecules . Hydrogen bond Self-Tests The strongest of the three chemical bonds. Covalent bond An ion with a positive charge Cation An ion with a negative charge Anion Self-Tests The collective term for all decomposition reactions. Catabolism The collective term for all synthesis reactions. Anabolism A protein that lowers the activation energy required for a reaction. Enzyme A. Organic Molecules Why carbon?
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2 Why Carbon? Carbon’s four electrons can participate in up to four covalent bonds Carbon can bond to each other forming straight chain, branched chains, rings. carbon can bond to: hydrogen ( forms one bond) oxygen ( two bonds) nitrogen (three bonds ) sulfur (two bonds ) phosphorus (five bonds) Functional Groups Functional group is an arrangement of atoms in an organic molecule that is responsible for most of the chemical properties of that molecule. Chemical properties of organic
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This note was uploaded on 10/05/2011 for the course MICRO 1011 taught by Professor Dr.gayda during the Fall '09 term at LSU.

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lecture 4 - Lecture 4 Biological Organic Molecules A....

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