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BIOL 1201 Final (got 96%)

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Biological Sciences
BIOL 1201
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Final Examination Learning ObjectivesThe final is on Thursday May 12 at 730 AM in Campbell AuditoriumBring your LSUID and a number 2 pencil85 questions worth 2 points each 170 pointstop score could be 11333BIOLOGICAL MOLECULESAmino acidsStructure Central carbonAmino group NH2Carboxyl group COOHHydrogenR Group20 different R groups each makes a different amino acidWhat determines the functional characteristics of the molecule The R groupdifferent R groups make the amino acids have different usesFig 517What is the relationship of the different types of lipids and their melting points Saturated and UnsaturatedUnsaturated has a lower melting point than saturated because their fats are kinkyWhat is a saturated fat Fat that is saturated with H does not have double bonds between adjacent CarbonsWhat is an unsaturated fat Fat with double bonds between CarbonsFigure 512 ENERGETICS OF REACTIONS1Figures 814 and 815know these figures wellBe sure you understand them and can explain themsee also p 160Figure 814Exergonic ReactionFigure 815Enzyme Reaction The reactants need to get to the Transition state to beThe black line is the normal course that a reaction would take able to react The red line is the course with the enzymeEis the Activation Energyenergy required to moveThe enzyme speeds up the process by reducing the activation A the reactants to the transition stateenergy making it easier for the reactants to move to theG is the free energy changehere the reaction transition state therefore making the process shorterreleases energy heatExergonic Endergonic Fig 86G sign positive and negative values G is the Free Energy ChangeGExergonic reaction releases energyGEndergonic reaction requires energyHow is G calculated GHT SHEnthalpy change TTemperature SEntropy changeActivation energy barrier GWhat is it Energy required for the favorable positioning of the reactants so the reaction can occur How do enzymes affect catalytic rates rate of conversion of substrate to product They accelerate catalytic rates because they lower the E activation energyAWhat aspect of energetics do enzymes not affect The G ValueWhat is the function of ATP in cellular metabolism Provide energy for the cell to useATPenergy currency of the cell2
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