Biology 1134 (Exam 2) Questions And Answers

Biology 1134 (Exam 2) Questions And
Answers
________________whaswawmajorwimpactwonwreactionwrate.w-wCORRECTwwANSWER-
temperature

Awcellwdoeswthreewmainwkindswofwwork:w-wCORRECTwwANSWER-Mechanicalwwork-
wmovementwofwciliawandwflagella,wcontractionwofwmusclewcells,wandwmovementwofwchromoso

mesw(mitosiswandwmeiosis)

Transportwwork-
wpumpingwsubstanceswacrosswmembraneswagainstwthewdirectionwofwspontaneouswmoveme

ntw(activewtransport)

Chemicalwwork-
winvolvingwstockpiling,wbuilding,wrearranging,wandwbreakingwapartwsubstancesw(suchwaswsy

nthesiswofwpolymerswfromwmonomers)

aA+bB==cC+dDw-wCORRECTwwANSWER-AwandwBwarewthewreactants
CwandwDwarewthewproducts
a,b,c,dwarewthewnumberwofwmolesw

Thewreactionwiswreversible
ThewratewofwreactionwiswdependentwuponwamountwofwenergywandwconcentrationswofwA,B,C,
D.

ActivationwEnergyw-wCORRECTwwANSWER-
Inworderwtowinitiatewawreaction,wawsmallwamountwofwenergywiswneeded


(Forwexample:wthewkickstartwtowawmotorcycle,wthewturningwofwthewkeywtowstartwawcar,wthewpulli
ngwbackwonwthewstringwofwthewlawnwmower)

Activewsitew-wCORRECTwwANSWER-
thewreactantswbindswtowawspecificwlocationwonwthewenzyme

, ActivewTransportw-wCORRECTwwANSWER-
thewmovementwofwawsolutewacrosswawmembranewagainstwitswconcentrationwgradient

AdenosinewTriphosphatew(ATP)w-wCORRECTwwANSWER-
thewimmediatewsourcewofwenergywthatwpowerswcellularwwork

AerobicwRespirationw-wCORRECTwwANSWER-
ifwoxygenwiswthewfinalwacceptorw(i.e.woxygenwiswreduced)

Allwlivingwcellswarewsurroundedwbywaw-wCORRECTwwANSWER-
PlasmawMembranew(akawcellwmembrane)

AnaerobicwRespirationw-wCORRECTwwANSWER-
ifwthewfinalwelectronwacceptorwiswawmoleculewotherwthanwoxygen,wandwleadswtowfermentation

Arewmembraneswsolid?w-wCORRECTwwANSWER-No,wtheywhavewfluidity.

Aswtemperaturew________________,wcollisionswbetweenwsubstrateswandwactivewsiteswocc
urwmorewfrequentlywaswmoleculeswmovew_____________.w-wCORRECTwwANSWER-
increase,wfaster

Aswthewsubstratewbindswtowthewenzyme,wthewenzymewchangeswshapewresultingwinwanw____
________w____________.w-wCORRECTwwANSWER-Inducedwfit

Atw_____wsubstratewconcentrations,wanw_________winwsubstratewspeedswbindingwtowavaila
blewactivewsites.w-wCORRECTwwANSWER-low,wincrease

ATPwcanwbewbrokenwdownwintow-wCORRECTwwANSWER-AdenosinewDiphosphatew(ADP)

ATPwiswawtypewofw-wCORRECTwwANSWER-
nucleotidewconsistingwofwthewsugarwribose,wthewnitrogenouswbasewadenine,wandwawchainwof
wthreewphosphates.




Autotrophsw-wCORRECTwwANSWER-
photosyntheticworganismswproducewtheirwownworganicwmolecules,wsuchwaswcarbohydrates
,wusedwtowmakewATP.

Cellwmembranesw-wCORRECTwwANSWER-
Thinwstructureswmadewmainlywofwphospholipidsw(bilayer),wproteins,wandwcarbohydrates

Chargedwandwpolarwmoleculeswwillwbewattractedwtow-wCORRECTwwANSWER-water

Chargedwandwpolarwmoleculeswwillwbewunablewtowpasswthroughwthew______________winter
iorwofwthewphospholipidwbilayer.w-wCORRECTwwANSWER-hydrophobic