Biology 1201 LSU Exam 2 Questions and Answers 100% Pass

Biology 1201 LSU Exam 2 Questions and Answers 100% Pass What type of chemical reaction is without outside energy? Spontaneous (exergonic/downhill) NOT INSTANTANEOUS -decreasing enthalpy and increasing entropy What is the equation for Free Energy? deltaG=deltaH-TdeltaS -free enrgy=enthalpy-(temp.)(entropy;disorder) -high deltaS=low delta G Entropy Disorder: -breakdown: increase in disorder, more parts -synthesis: decrease in disorder, less parts -high entropy=low free energy Describle a Non-Living System: -less organized (high entropy) -lower energy (lower free energy) -very slow Fermentation -glycolysis still occurs -produces NO energy Fermentaion Diagram: Pyruvic Acid --> Ethanol (yeast and micro-organizms)& Lactic Acid (Animals) -Release of CO2 -Put in NADH+H+; put out NAD What are organic catalysts? Enzymes What is almost all protiens (large and globular) and highly specific? Enzymes Enzymes speed up the rate of a reaction by doing what? Lowering the activation energy What is the Enzyme Process? Enzyme+Substrate--> Enzyme substrate complex--> Enzyme product complex--> Enzyme+Product -enzymes not consumed during this process** What type of reaction requires outside energy? 2. non-spontaneous: ex: food,ect. (endergonic/uphill) -increasing enthalpy and decreasing entropy If deltaG is negative what is the result? Exergonic If deltaG is positive what is the result? Endergonic The more compact the molecules are the more _______ _______it has; more complex molecule= more ____________. -Free energy -DeltaG Describe a Living System: -Highly organized (low entropy) -High energy (high free energy) -Fast -Use external energy source (energy) -Use oraganic catalyst:speed (enzyme) Substrate binds to active site and alters shape of enzyme: Induced-Fit model -this creates a fit that promotes the reaction -they do not match up perfectly, but close enough Lock and Key Model: -substrate does not alter shape of the enzyme -fit perfectly together Calvin Cycle: -energy that drives this cycle originates from the light reactions -inputs 3 CO2-->(6 ATP-->6 ADP+P)-->(6 NADPH+H+-->