Bio Sci 93 Midterm 2 Practice Questions
and Answers
Catabolism iiis iito iianabolism iias ii___________________ iiis iito ii___________________.
a.) iiexergonic; iispontaneous
b.) iiexergonic; iiendergonic
c.) iifree iienergy; iientropy
d.) iiwork; iienergy ii- iiCorrect iiAnswers ii-b
Most iicells iicannot iiharness iiheat iito iiperform iiwork iibecause
a.) iiheat iidoes iinot iiinvolve iia iitransfer iiof iienergy.
b.) iicells iido iinot iihave iimuch iithermal iienergy; iithey iiare iieventually iicool.
c.) iitemperature iiis iiusually iiuniform iithroughout iia iicell.
d.) iiheat iican iinever iibe iiused iito iido iiwork. ii- iiCorrect iiAnswers ii-c
Which iiof iithe iifollowing iimetabolic iiprocesses iican iioccur iiwithout iia iinet iiinflux iiof
iienergy iiform iisome iiother iiprocess?
a.) iiADP ii+ iiP ii->> iiATP+H2O
b.) iiC6H12O6 ii+ ii6H2O ii->> ii6CO2 ii+ ii6H2O
c.) ii6CO2 ii+ ii6H2O ii->> iiC6H12O6 ii+ ii6H2O
d.) iiAmino iiAcids ii->> iiProtein ii- iiCorrect iiAnswers ii-b
If iian iienzyme iiin iisolution iiis iisaturated iiwith iisubstrate, iithe iimost iieffective iiway iito
iiobtain iia iifaster iiyield iiof iiproducts iiis iito
a) iiadd iimore iiof iithe iienzyme.
b) iiheat iithe iisolution iito ii90 iidegrees iiC.
c) iiAdd iimore iisubstrate.
d) iiAdd iia iinoncompetitive iiinhibitor. ii- iiCorrect iiAnswers ii-a
Some iibacteria iiare iimetabolically iiactive iiin iihot iisprings iibecause ii
a) iithey iiare iiable iito iimaintain iia iilower iiinternal iitemperature.
b) iiHigh iitemperatures iimake iicatalysis iiunnecessary.
, c) iitheir iienzymes iihave iihigh iioptimal iitemperatures.
d) iitheir iienzymes iiare iicompletely iiinsensitive iito iitemperature. ii- iiCorrect iiAnswers ii-c
The iiimmediate iienergy iisource iithat iidrives iiATP iisynthesis iiby iiATP iiSynthase iiduring
iioxidative iiphosphorylation iiis iithe ii
a) iioxidation iiof iiglucose iiand iiother iiorganic iicompounds
b) iiflow iiof iielectrons iidown iithe iielectron iitransport iichain
c) iiH+ iiconcentration iigradient iiacross iithe iimembrane iiholding iiATP iiSynthase
d) iiTransfer iiof iiphosphate iito iiADP ii- iiCorrect iiAnswers ii-c
Which iimetabolic iipathway iiis iicommon iito iiboth iifermentation iiand iicellular iirespiration
iiof iia iiglucose iimolecule?
a) iithe iicitric iiacid iicycle
b) iithe iielectron iitransport iichain
c) iiglycolysis
d) iireduction iiof iipyruvate iito iilactate ii- iiCorrect iiAnswers ii-c
The iifinal iielectron iiacceptor iiof iithe iielectron iitransport iichain iithat iifunctions iiin iiaerobic
iioxidative iiphosphorylation iiis
a) iiOxygen ii
b) iiWater
c) iiNAD+
d) iiPyruvate ii- iiCorrect iiAnswers ii-a
In iiMitochondria, iiexergonic iiredox iireactions
a) iiare iithe iisource iiof iienergy iidriving iiprokaryotic iiATP iisynthesis.
b) iiprovide iithe iienergy iithat iiestablishes iithe iiproton iigradient ii
c) iireduce iicarbon iiatoms iito iiCO2
d) iiare iicoupled iivia iiphosphorylated iiintermediates iito iiendergonic iiprocesses ii- iiCorrect
iiAnswers ii-b
Which iiis iithe iioxidizing iiagent iiin iithe iifollowing iireaction?
Pyruvate ii+ iiNADH ii+ iiH+ ii->> iiLactate ii+ iiNAD+
a) iioxygen
b) iiNADH
c) iilactate
d) iipyruvate ii- iiCorrect iiAnswers ii-d
When iielectrons iiflow iialong iithe iielectron iitransport iichains iiof iimitochondria, iiwhich iiof
iithe iifollowing iichanges iioccurs?
and Answers
Catabolism iiis iito iianabolism iias ii___________________ iiis iito ii___________________.
a.) iiexergonic; iispontaneous
b.) iiexergonic; iiendergonic
c.) iifree iienergy; iientropy
d.) iiwork; iienergy ii- iiCorrect iiAnswers ii-b
Most iicells iicannot iiharness iiheat iito iiperform iiwork iibecause
a.) iiheat iidoes iinot iiinvolve iia iitransfer iiof iienergy.
b.) iicells iido iinot iihave iimuch iithermal iienergy; iithey iiare iieventually iicool.
c.) iitemperature iiis iiusually iiuniform iithroughout iia iicell.
d.) iiheat iican iinever iibe iiused iito iido iiwork. ii- iiCorrect iiAnswers ii-c
Which iiof iithe iifollowing iimetabolic iiprocesses iican iioccur iiwithout iia iinet iiinflux iiof
iienergy iiform iisome iiother iiprocess?
a.) iiADP ii+ iiP ii->> iiATP+H2O
b.) iiC6H12O6 ii+ ii6H2O ii->> ii6CO2 ii+ ii6H2O
c.) ii6CO2 ii+ ii6H2O ii->> iiC6H12O6 ii+ ii6H2O
d.) iiAmino iiAcids ii->> iiProtein ii- iiCorrect iiAnswers ii-b
If iian iienzyme iiin iisolution iiis iisaturated iiwith iisubstrate, iithe iimost iieffective iiway iito
iiobtain iia iifaster iiyield iiof iiproducts iiis iito
a) iiadd iimore iiof iithe iienzyme.
b) iiheat iithe iisolution iito ii90 iidegrees iiC.
c) iiAdd iimore iisubstrate.
d) iiAdd iia iinoncompetitive iiinhibitor. ii- iiCorrect iiAnswers ii-a
Some iibacteria iiare iimetabolically iiactive iiin iihot iisprings iibecause ii
a) iithey iiare iiable iito iimaintain iia iilower iiinternal iitemperature.
b) iiHigh iitemperatures iimake iicatalysis iiunnecessary.
, c) iitheir iienzymes iihave iihigh iioptimal iitemperatures.
d) iitheir iienzymes iiare iicompletely iiinsensitive iito iitemperature. ii- iiCorrect iiAnswers ii-c
The iiimmediate iienergy iisource iithat iidrives iiATP iisynthesis iiby iiATP iiSynthase iiduring
iioxidative iiphosphorylation iiis iithe ii
a) iioxidation iiof iiglucose iiand iiother iiorganic iicompounds
b) iiflow iiof iielectrons iidown iithe iielectron iitransport iichain
c) iiH+ iiconcentration iigradient iiacross iithe iimembrane iiholding iiATP iiSynthase
d) iiTransfer iiof iiphosphate iito iiADP ii- iiCorrect iiAnswers ii-c
Which iimetabolic iipathway iiis iicommon iito iiboth iifermentation iiand iicellular iirespiration
iiof iia iiglucose iimolecule?
a) iithe iicitric iiacid iicycle
b) iithe iielectron iitransport iichain
c) iiglycolysis
d) iireduction iiof iipyruvate iito iilactate ii- iiCorrect iiAnswers ii-c
The iifinal iielectron iiacceptor iiof iithe iielectron iitransport iichain iithat iifunctions iiin iiaerobic
iioxidative iiphosphorylation iiis
a) iiOxygen ii
b) iiWater
c) iiNAD+
d) iiPyruvate ii- iiCorrect iiAnswers ii-a
In iiMitochondria, iiexergonic iiredox iireactions
a) iiare iithe iisource iiof iienergy iidriving iiprokaryotic iiATP iisynthesis.
b) iiprovide iithe iienergy iithat iiestablishes iithe iiproton iigradient ii
c) iireduce iicarbon iiatoms iito iiCO2
d) iiare iicoupled iivia iiphosphorylated iiintermediates iito iiendergonic iiprocesses ii- iiCorrect
iiAnswers ii-b
Which iiis iithe iioxidizing iiagent iiin iithe iifollowing iireaction?
Pyruvate ii+ iiNADH ii+ iiH+ ii->> iiLactate ii+ iiNAD+
a) iioxygen
b) iiNADH
c) iilactate
d) iipyruvate ii- iiCorrect iiAnswers ii-d
When iielectrons iiflow iialong iithe iielectron iitransport iichains iiof iimitochondria, iiwhich iiof
iithe iifollowing iichanges iioccurs?
