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
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