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Test Bank - Biochemistry-A Short Course, 4th Edition (Tymoczko, 2019)
Test Bank - Biochemistry-A Short Course, 4th Edition (Tymoczko, 2019)
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lOMoAR cPSD| 41562, lOMoAR cPSD| 41562175
Test yBank y- yBiochemistry-A yShort yCourse, y4th yEdition y(Tymoczko,
y2019)
Chapter y01: yBiochemistry yand ythe yUnity yof yLife
1. What yunderlies ythe yunity yof ybiochemistry?
a. Some yorganisms yare yhighly yuniform yat ythe ymolecular ylevel.
b. All yleaving ybeings yare yhighly yuniform yat ythe yorganismal ylevel.
c. Organisms yare yhighly yuniform yat ythe ycellular ylevel.
d. All yorganisms yare yhighly yuniform yat ythe ymolecular ylevel.
e. Some yleaving ybeings yare yhighly yuniform yat ythe ycellular ylevel.
ANSWER: y d
2. How ymany ytimes ymore ycarbon yis ycontained yin yorganisms ythan yin yEarth's ycrust?
a. 60 ytimes
b. 50 ytimes
c. 9.5 ytimes
d. 10 ytimes
e. 100 ytimes
ANSWER: y b
3. Why yis ycarbon ypreferable yto ybe ythe ychemical ybase yfor ylife?
a. Carbone ydioxide yis yessentially yinsoluble yin ywater.
b. It yescapes ythe ybiochemical ycirculation yonce yit yis yutilized.
c. The ystability yand ystrength yof ythe ycarbon–carbon ybonds ymake yit ya ygood ybase yfor ylarger
ymolecularycomplexes.
d. By yreacting ywith yhydrogen, yit ycan yundergo ycombustion, ywhich yprovides yorganisms ywith yenergy.
e. Carbon ydioxide yis ya ystrong yconstruction ymaterial.
ANSWER: y c
4. What yis yNOT ya yprimary yfunction yof yproteins?
a. signal yreceptors
b. energy ystorage
c. signal ymolecules
d. structural yunits
e. defensive yagents
ANSWER: y b
5. What ydoes ybeing ya ycatalyst ymean?
a. slowing ydown ythe yrate yof yreactions yto yincrease ycontrol yover ythem
b. being yfully yutilized yin ythe ycourse yof ya yreaction; ycausing yno yunnecessary ychange yin ythe
yreactionycomponents
c. repeatedly yenhancing ythe yrate yof ychemical yreactions ywithout ybeing yconsumed
d. repeatedly ydecreasing ythe yrate yof ychemical yreactions ywithout ybeing yaffected yby yenzymes
e. enhancing ythe yrate yof ychemical yreactions ybeing ypermanently yaffected yduring ytheir ycourse yto
ycontrolythe yenvironmental ychanges
ANSWER: y c
, lOMoAR cPSD| 41562175
Test yBank y- yBiochemistry-A yShort yCourse, y4th yEdition y(Tymoczko,
y2019)
6. Which ystructure yCANNOT ybe ya ynucleotide?
a. a yfive-carbon ysugar yattached yto ya ybase yand yat yleast yone yphosphoryl ygroup
b. a yfive-carbon ysugar yattached yto ya yheterocyclic yring ystructure yand yone yphosphoryl ygroup
c. a yfive-carbon ysugar yattached yto ya ybase yand ytwo yphosphoryl ygroups
d. a yfive-carbon ysugar yattached yto ya ybase yand yfour yphosphoryl ygroups
e. a yfive-carbon ysugar yattached yto ya yheterocyclic yring ystructure yand ythree yphosphoryl ygroups
ANSWER: y d
7. What ydetermines ythe ynature yof yan yorganism?
a. the yinformation ystored yin yproteins
b. the yinformation ycontained yin ydeoxyribonucleotides
c. the yinformation ystored yin ythe ydeoxyribonucleic yacid
d. the yinformation ystored yin ybiological ypolymers
e. the yinformation ycontained yin ythe yribonucleic yacid
ANSWER: y c
8. What yis yNOT ya ynucleotide?
a. adenine
b. thymine
c. uracil
d. cytosine
e. adenosine
ANSWER: y e
9. Which ystatement yabout ycompositional ydifferences ybetween yDNA yand yRNA yis yTRUE?
a. Ribonucleotides ycontain yan yadditional yhydroxyl ygroup.
b. Ribonucleotides yexploit ythree ydifferent ybases, ywhile ydeoxyribonucleotides yexploit yfour.
c. Deoxyribonucleotides ycontain yan yadditional yhydroxyl ygroup.
d. Deoxyribonucleotides ycontain ya yfive-carbon ysugar, ywhereas yRNA ybases ycontain ya ysix-carbon
ysugar.
e. Ribonucleotides yexploit yfour ydifferent ybases, ywhile ydeoxyribonucleotides yexploit ytree.
ANSWER: y a
10. What yis ythe ymolecular ybasis yfor yestablishing yintracellular ycompartments?
a. the yformation yof ymembranous ybarriers ydue yto yability yof yproteins yto yform yextended ylinear
ystructures
b. the yability yof ylipids yto yform ybarriers ydue yto ytheir ydual yproperties yregarding ysolubility yin ywater
c. the yformation yof ylipid ybarriers ydue yto ythe ysmall ysize yof ylipids
d. the ydevelopment yof ylipid ybarriers ydue yto yhydrophilic yinteractions ywithin ylipid ymolecules
e. the yformation yof ylipid ybarriers ydue yto ythe ydual ynature yof ylipids yregarding ytheir
yinteractions ywithyproteins
ANSWER: y b
11. What ycan yserve yas ysites yof ycell-to-cell yinteractions?
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