BCH 351 Exam 1 Questions And Answers

BCH 351 Exam 1 Questions And
Answers

5rFunctionalrGroupsr-rCORRECTrrANSWER-
amino,rhydroxyl,rsulfhydryl,rphosphoryl,rcarboxyl,rmethyl

acidosisr-rCORRECTrrANSWER-whenrbloodrpHrfallsrbelowr7.4

activersiter-rCORRECTrrANSWER-interfacerofrthersubunits

Alanine,rAlar-rCORRECTrrANSWER-

alkalosisr-rCORRECTrrANSWER-whenrbloodrpHrrisesrabover7.4

alpha-alpharcornerrandrbeta-alpha-betarloopr-rCORRECTrrANSWER-mostrcommonrmotifs
providesrtworlayersrofrsecondaryrstructure

alpha-helixr-rCORRECTrrANSWER--ralmostralwaysrrightrhandedrhelix
-rh-bondsrbetweenrcarbonylrOr(n)randrresiduerofrther(n+4)ramide
-r3.6raminoracidsrperrturn
-rsiderchainr(rrgroup)rpointingroutward,rdornotrparticipaterinrh-bonding

amider-rCORRECTrrANSWER-haverarcarbonylrgrouprbetweenrthernitrogenrandrRrgroup

Aminesr-rCORRECTrrANSWER-nitrogenrjoinedrtoratrlesatroneralkylrgroup

aminoracidrclassificationr-rCORRECTrrANSWER-GroupedrbasedronrR-group
Nonpolarr(hydrophobic)
-rmostlyrlinearrorrbranchedrhydrocarbonsr(7)
-raromaticr(3)
Polarr(Hydrophilic)
-runchargedr(5)
-rpositivelyrchargedr(3)
-rnegativelyrchargedr(2)

, Aminoracidrgeneralrstructurer-rCORRECTrrANSWER-
4rdifferentrgroupsrcovalentlyrbondedrtorthercarbon.

aminoracidsr-rCORRECTrrANSWER-proteinsrarerlinearrheteropolymersrofra-aminoracids

Anotherrnamerforrbetarsheetsr-rCORRECTrrANSWER-betarpleatedrsheets

antiparallelrbetarsheetr-rCORRECTrrANSWER-H-bondsrarerperpendicular,rstronger

Arginine,rArgr-rCORRECTrrANSWER-

Asparagine,rAsnr-rCORRECTrrANSWER-

Aspartate,rAspr-rCORRECTrrANSWER-

basicrstructurerofrcollagenr-rCORRECTrrANSWER-triplerhelixrfiber
-r3rleftrhandedrhelicesrformrarrightrhandedrtriplerhelixrfiber
-reachrhelixrhasrardistinctiveraminoracidrsequencer(Glyr-rXr-
rY)rwhererXrisrusuallyrProrandrYrisroftenr4-hydroxyproline

-rGlyrliesrnearrthercenterrofrthertriplerhelix

betarbarrelr-rCORRECTrrANSWER--
rcontainsrmultiplertwistedrbetarstrandsrformingrarbetarsheetrinrarbarrelrstructure

-rprovidesrchannelsrforrpolarrmolecules

betarsheetr-rCORRECTrrANSWER-multiplerbetarstrandsrheldrtogetherrbyrH-
bondsrbetweenrbackbonerCOrandrNHrgroupsronrseparaterstrands
therRrgroupsrarerinrtrans
hydrophilicrRrgroupsrfacingraqueousrsolution,rhydrophobicrRrgroupsrfacingrinsidertherprotei
n

betarstrandr-rCORRECTrrANSWER--
rsiderchainsrarerpositionedraboverandrbelowrpolypeptiderbond

-rpeptiderchainrisralmostrfullyrextended
-rarrangedrsiderbyrsidertorbecomerbetarsheets
-rRrgroupsrinrtrans,rpointingroutwardrandrperpendicularrtorH-bondingrsurface

betarturnsr-rCORRECTrrANSWER-connectsrtworbetarstrandsrinranrantiparallelrbetarsheet
-rtyper1randr2reachrcontainr4raminoracids
-rH-
bondrbetweenrcarbonylroxygenrofrther1straminoracidrandramidergrouprofrther4thraminoracid

beta-mercaptoethanolr(BME)r-rCORRECTrrANSWER-reducingragent