02Chemistry Review - Amino Acids Quiz Friday Identify basic...

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Amino Acids Quiz Friday Identify basic components of amino acids: Identify an amino acid: Full name Three letter code 1 letter code List Categories which aa are in each one
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Chemistry review (Thermodynamics and Buffers): Learning objectives: Compare and contrast equilibrium and steady state and apply these to living systems. Understand the thermodynamics of chemical reactions: Know the difference between ΔG and ΔG˚’ Be able to identify the direction a reaction will proceed given thermodynamic data. Explain the chemical basis for pH Understand the meaning of pKa, and be able to predict the protonation state and charge of a functional group. Explain how a buffer works, and why it is important for biological systems.
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Thermodynamic Principles A Review Overall Thermodynamics determines whether a physical process is possible (i.e. spontaneous ). provides no information about the rate of a physical process. Gibbs Free Energy (G) G = H TS H = Enthalpy (Heat Content), S = Entropy (Disorder) A —— > B ∆G = G B G A ∆G = ∆H – T∆S
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Δ G = H T S Change in Enthalpy (∆H) Exothermic : system releases energy Endothermic : system gains energy [energy required to break bonds in reactants] minus [energy released from bonds formed in products] Change in Entropy (∆S) [Disorder of products ] minus [Disorder of reactants ] Systems tend toward disorder
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Change in Free Energy (∆G) Exergonic (- Δ G) : spontaneous
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