Biology Lecture 3 - Biology Lecture 3 Richa's Office Hours-...

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Biology Lecture 3 Richa’s Office Hours- RLM 6.126 from 3:00pm-4:00pm, and 5:00pm-6:00pm In a closed system you can have chemical equilibrium because the products and reactants are never leaving. ¾ of the planet is water, and 70-95% of cells are made of water Water plays a roll in all of the chemical reactions that are cells engage in. Water is a polar molecule: it has partial charges Hydrogen bonds play a role in the structure of DNA, and structure of proteins Each last only a trillionth of a second; they form and break constantly Cohesion- hydrogen bonds hold the water molecules together Adhesion- attraction between different substances Surface tension is related to cohesion Thin film over hydrogen bonds forms and allows insects to walk on water Specific heat- the amount of energy needed to change the temperature of a substance by a certain amount More heat allows water molecules to move because they break hydrogen bonds When the ocean is cool in the summer it allows cool air to blow into the inland. In the winter
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This note was uploaded on 05/03/2011 for the course BIO 311 C taught by Professor Mcclelland during the Fall '09 term at University of Texas.

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Biology Lecture 3 - Biology Lecture 3 Richa's Office Hours-...

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