24 - LECTURE 24 ANNOUNCEMENTS MAKE-UP MIDTERM EXAM SUNDAY...

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LECTURE 24 ANNOUNCEMENTS: MAKE-UP MIDTERM EXAM: SUNDAY 10/24 NOON - 2:30PM in BIOTECH. GRADING HAS BEGUN ON THE MIDTERM EXAM…. TODAY: WEDNESDAY'S LECTURE : CARBOHYDRATES INFLUENCE OF CONCENTRATION AND ELECTRIC FIELD ON FREE ENERGY: BIG! OTHER "HIGH ENERGY" MOLECULES THAT WE WILL MEET NEXT WEEK DEFINITION OF "HIGH ENERGY MOLECULES" WHY ATP IS A "HIGH ENERGY MOLECULE" RECOGNITION OF CARBOHYDRATE AT THE CELL SURFACE STRUCTURAL ROLES OF PROTEOGLYCANS DON'T FORGET: PyMOL ASSIGNMENT ON CARBOHYDRATES FOR WED QUIZ 10/27 THE "CONCENTRATION CELL", A RXN DRIVEN JUST BY CONC DIFFERENCE "BIOENERGETICS" INTRO TO REDOX RXNS IN METABOLISM
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1. STABILITY OF REACTANTS vs STABILITY OF PRODUCTS ( G o ) 2. CONCENTRATIONS OF REACTANTS vs PRODUCTS 3. FOR IONS, ELECTRICAL POTENTIAL ACROSS MEMBRANES 4. REDOX POTENTIALS 4 FACTORS CONTROL TENDENCY OF CHEMICAL RXNS TO OCCUR: ( ENZYMES CONTROL RATE OF ANY BIOCHEMICAL RXN, INCLUDING LEAVING THE RATE ~ 0)
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USING THE GIBBS FUNCTION G = G + RTln([PRODUCTS]/[REACTANTS]) o G = G o + RTln[NaCl] R /[NaCl] L (NaCl) (NaCl) LEFT RIGHT e.g. ATP + H 2 O ADP + P i + H + - 7 1. CHOOSE STANDARD STATE, e.g. 1 M AND ATM. PRESSURE 2. DIVIDE THE STAND. STATE INTO THE CONC UNITS NOW GONE! e.g. [NaCl] = 100mM
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This note was uploaded on 12/10/2011 for the course BCHEM 3350 taught by Professor Feig during the Fall '09 term at Cornell.

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24 - LECTURE 24 ANNOUNCEMENTS MAKE-UP MIDTERM EXAM SUNDAY...

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