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LECTURE 5 CHAPTER 5 - Phosphorylation-the transfer of...

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LECTURE 5 CHAPTER 5 7/19/10 Energy -kinetic: moving energy -Potential: stored energy 1 st law of thermoregulation: energy cannot be created nor destroyed 2 nd law of thermoregulation: disorder of the universe is increasing Heat -any trance or energy conversion occurs, some energy always escapes as heat -chemical reaction stores or releases chemical reaction in cell -Endogonic: energy in (eating) -Exogonic: energy out (breath out) Cellular Respiration -Process of energy releasing chemical breakdown of food molecules and then the storage of the energy in a form that can use to perform work. Cellular Metabolism -all exo and endogomic chemical reaction that go with the cell Energy Coupling -The process of using energy released form exo and endo reaction ATP-the power behind almost all cell work Hydrolysis -Atp is broken apart by hydrolyses into Atp, it loses one phosphate group. -next molecule picks up phosphate group energized -The energy from the work nearby ADP pick up the phosphate group
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Unformatted text preview: Phosphorylation-the transfer of phosphate groups by molecules-most cellular work depends upon ATP energizing other molecule by phosphorylating them Types of Cellular work:-chemical: reactants provide energy to drive the endergonic synthesis of products-mechanical: transfer of phosphate groups causes protein to change shape and pull on actin filaments (muscle cell contraction)-transport: active transport of substances across a cell membrane ( require ATP) Energy of Activation (Ea)-an amount of energy needed to get activation going. Also known as the energy barrier Enzymes **ending in ase is usually and enzyme-protein molecule that is biological catalyst. Increasing rate of reaction without itself being changed.-lowers the energy barrier-it has a place called active site , a grove with a specific shape-it looks for a particular function that will fit in active site...
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