Determine whether the following molecules are polar or

CHEM4270 BiochemistryI Proteins:MainAgentsinBiologicalFunctions  Catalysis - Enolase‐glycolyticpathway - DNApolymerase‐DNAreplication  Transport - Hemoglobin‐O2transport - Lactosepermease‐transportslactoseacrosscellmembrane  Structure - Collagen‐connectivetissue - Keratin‐hair,nails,feathers,horns  Motion - Myosin‐muscletissue - Actin‐muscletissue,cellmotility  AminoAcids:BuildingBlocksofProteins - 20aminoacids - Linearheteropolymersofα‐aminoacids - Aminoacidshavepropertiesthatarewell‐suitedtocarryoutavarietyofbiological functions  Capacitytopolymerize  Usefulacid‐baseproperties  Variedphysicalproperties  Variedchemicalfunctionality - Mostα‐aminoacidsarechiral  All(exceptproline)have: - Acidiccarboxylicgroups - Basicaminogroup - α‐hydrogenconnectedtoα‐carbon  Rgroupisuniquetoeachaminoacid(GlycinehasHydrogenasRgroup,α‐carbonis notchiral) - NamingAminoAcids  Startatα‐carbon,continuenumberingdownchain - AllAminoAcidsarechiral(exceptGlycine)  ProteinsonlycontainLisomersofaminoacids(AminogroupisontheLeft) - Classifications  Nonpolar,aliphaticRgroups(7) - Rgroupisahydrocarbonchain - NoadditionchargesbesidesZwitterioncountercharges - Methionine‐hasthioether,unreactivebecausecarbonatomsneutralizecharge  AromaticRgroups(3) - AbsorbUVlightat270‐280nm - Tryptophanhasindolering  Pol