BIOL 1107 1nd Edition Lecture 2 Outline of Last Lecture I. Biology & ChemistryII. Define Important TermsIII. Molecular InteractionsOutline of Current LectureI. CarbonII. Functional GroupsIII. WaterCurrent LectureI. CarbonCarbon forms backbone of proteins, lipids & sugars in bodyIn addition, it forms lots of diverse structures, which include long chains, branched, rings and complex ringsRings- glucose (carbon and oxygen major backbone)Complex rings- cholesterolII. Functional GroupsFunctional groups change properties of moleculesThese notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.Some functional groups:Phosphate group- Methyl- Which ones can become charged? Carboxyl (O becomes O-), Amino (N becomes N+) because it gains a hydrogenWhich of these are non-polar? MethylIn addition to functional group, shape is important.WaterHydrogen bonds (still present when water becomes solid, crystalline structure)How do water molecules interact with O2 molecules and NH3 molecules? Indicate types of reactions (view Figure 1)Figure 1The molecule (Figure 2) shown is likely to be:(a) Hydrophobic- doesn’t like water(b) Hydrophilic- likes waterFigure 2Water is just going to form a shell around the molecule, but won’t completely break it apart (Ex:sugar)Polar molecules- hydrophobicNon-polar molecules- hydrophilicAmphipathic molecules- both hydrophobic and hydrophilicWater molecules almost always tend to want to hang out with its own kind.Know: hydrophobic effect, non-polar interaction (van der Waals)Is C6H8O6 likely to be water-soluble?
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