Biochemistry Notes Archive

Biochemistry Notes Archive - Biochemistry Wednesday January...

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Biochemistry Wednesday January 23 2008 Handouts: None. Syllabus was electronic. Printed out a small packet of data from Sullivan. Went over class policy and had a quiz. The quiz is most likely not graded. Monday January 28, 2008 Handouts: None Lecture: Review of basics for biochemistry Mole Reactions Kinetics Equilibrium Steady state Biological Systems Bonds Bonds are shown with a line between two atoms, signifying that they share a pair of electrons Bonds are commonly broken in one of two ways. Either there is an uneven breakage resulting in the formation of ions, or an even breakage resulting in the formation of radicals. Doublearrows show the movement of an electron pair whereas singlearrows show the movement of just one electron. The Mole A mole is 6.02 x 10^23 It is the number of atoms in 1g of hydrogen, and is a number that results from the arbitrary designation of the lightest atom as 1. Reactions Basically have the form A + B C + D Most reactions in biochemistry are rather simple, ATP is a transferase reaction.
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Kinetics Dealt primarily with rates. [A][B] assumed proportional to rates. Rate = k[A][B] Equilibrium Equilibrium is when the rate of the forward reaction is the same as the rate of the backward reaction Derivation Kf[A][B] = Kr[C][D] Kf/Kr = [C][D]/[A][B] Biological Systems Organisms are divided and categorized by Karl Von Linnaeus. Kingdom Phylum Class Order Family Genus Species (We also did a little on water, the next topic) Water is very important to life and to humans. Over 50% of our bodies is water and in terms of mass, there are 20,000 water molecules to every 75 lipid, 100 Na (Cl), and 1 protein. Water is seen in three phases, solid, liquid, and gas. The liquid and solid phases are condensed because they cannot be compressed any further. The liquid and gas phases are known as fluid because they take the shape of the container. Liquid water has many strange properties that we will explore later. Water is chemically an oxygen molecule bonded to two hydrogen molecules. Because of a pair of lone electrons, the two hydrogen are at an angle. Wednesday, January 30, 2008 The structure of H2O is bent, 2 electron pairs of the Oxygen are unshared and the other two are bonded to H atoms.
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The O-H bonds are not equal, the electrons are mostly at the oxygen. Oxygen is highly electronegative, giving the bond a partial polarity. Partially positive on the H side and partially negative on the O side. Sometimes, polar bonds result in non-polar molecules. CO2 is made up of two polar bonds that are directly opposite, making the molecule nonpolar. The polarity of the bonds lead to hydrogen bonding between water molecules. These weakened versions of Ionic bonds are responsible for many of the odd characteristics of water. Solid H2O is less dense than water because when it crystallizes, the molecules spread
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Biochemistry Notes Archive - Biochemistry Wednesday January...

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