Ch.13 Lehninger biochem test bank study guide

Ch. 13 Lehninger biochem test bank
h h h h h




1.hIfhthehdeltahG'°hofhthehreac onhAh-->hBhish-40hkJ/mol,hunderhstandardhcondi onshthehreac on:h



A)hishathequilibrium.h

B)hwillhneverhreachhequilibrium.h

C)hwillhnothoccurhspontaneously.h

D)hwillhproceedhathahrapidhrate.h

E)hwillhproceedhspontaneouslyhfromhAhtohB.h-hE



Forhthehreac onhAh--->B,hdeltahG'°h=h-
60hkJ/mol.hThehreac onhishstartedhwithh10hmmolhofhA;hnohBhishini allyhpresent.hA erh24hhours,hanalysishrev
ealshthehpresencehofh2hmmolhofhB,h8hmmolhofhA.hWhichhishthehmosthlikelyhexplana on?h



A)hAhandhBhhavehreachedhequilibriumhconcentra ons.h

B)hAnhenzymehhashshi edhthehequilibriumhtowardhA.h

C)hBhforma onhishkine callyhslow;hequilibriumhhashnothbeenhreachedhbyh24hhours.h

D)hForma onhofhBhishthermodynamicallyhunfavorable.h

E)hThehresulthdescribedhishimpossible,hgivenhthehfacththatG'°hish-60hkJ/mol.h-hC



Thehreac onhAh+hBh--->ChhashahdeltahG'°hofh-
20hkJ/molhath25°hC.hStar nghunderhstandardhcondi ons,honehcanhpredicththat:



A)hathequilibrium,hthehconcentra onhofhBhwillhexceedhthehconcentra onhofhA.h

B)hathequilibrium,hthehconcentra onhofhChwillhbehlesshthanhthehconcentra onhofhA.h

C)hathequilibrium,hthehconcentra onhofhChwillhbehmuchhgreaterhthanhthehconcentra onhofhAhorhB.h

D)hChwillhrapidlyhbreakhdownhtohAh+hB.h

E)hwhenhAhandhBharehmixed,hthehreac onhwillhproceedhrapidlyhtowardhforma onhofhC.h-hC

, Whichhofhthehfollowinghcompoundshhashthehlargesthnega vehvaluehforhthehstandardhfree-
energyhchangeh(G'°)huponhhydrolysis?h



A)hAce chanhydrideh

B)hGlucoseh6-phosphateh

C)hGlutamineh

D)hGlycerolh3-phosphateh

E)hLactoseh-hA



Forhthehfollowinghreac on,hdeltahG'°h=h+29.7hkJ/mol.



L-Malateh+hNAD+h--->oxaloacetateh+hNADHh+hH+



Thehreac onhashwri en:h



A)hcanhneverhoccurhinhahcell.h

B)hcanhoccurhinhahcellhonlyhifhithishcoupledhtohanotherhreac onhforhwhichhdeltahG'°hishposi ve.h

C)hcanhoccurhonlyhinhahcellhinhwhichhNADHhishconvertedhtohNAD+hbyhelectronhtransport.h

D)hcannothoccurhbecausehofhitshlargehac va onhenergy.

E)hmayhoccurhinhcellshathsomehconcentra onshofhsubstratehandhproduct.h-hE



Forhthehreac onhAh---
>B,hthehKeq'hish104.hIfhahreac onhmixturehoriginallyhcontainsh1hmmolhofhAhandhnohB,hwhichhonehofhthehfollo
winghmusthbehtrue?h



A)hAthequilibrium,htherehwillhbehfarhmorehBhthanhA.h

B)hThehratehofhthehreac onhishveryhslow.h

C)hThehreac onhrequireshcouplinghtohanhexergonichreac onhinhorderhtohproceed.

D)hThehreac onhwillhproceedhtowardhBhathahveryhhighhrate.h

E)hDeltahG'°hforhthehreac onhwillhbehlargehandhposi ve.h-hA