Powerpoint Notes Chapter 2 - 2 O • Can be different...

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Chapter 2 The Chemistry of the Cell
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Why are we carbon-based?
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Carbon 6 protons, 6 electrons
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Carbon Properties Valence = Bonds are covalent Can bond with Most likely bonds with C, O, H, N, S.
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Single, Double, AND Triple Bonds!
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C Molecules Stable Bond energy = energy to break bonds Expressed in Covalent bonds containing C have large bond energy Makes molecules very stable.
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Carbon Molecule Diversity Diversity due to C to C bonds allow for very long chains Can be linear or circular
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Cells Depend on Others Hydrocarbon insolubility except in membranes limits use Most biological compounds also contain O, N, S, and/or P Part of functional groups.
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Hydrogen Bonding Polar covalent bond Can be two different different molecules - H
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Unformatted text preview: 2 O • Can be different regions of same molecule - DNA. (transparencies) Unique Properties of Water • • • Unique Properties of Water • Absorbs energy for heat stabilization – STRUGGLE if cells could not absorb energy • Solvent for substances that form hydrogen bonds (spheres of hydrations) – ionic solids - NaCl – polar organics - methanol, urea, ammonia – nonpolar solvents insoluble - oil. Solubility Demo Macromolecule Assembly • Basic units are ___________ • Cells make large chains of monomers called __________ • Polymers built by condensation (dehydration) reactions. OH H Condensation OH H Two Monomers Joined; Water Formed OH H OH H Hydrolysis OH H...
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