Test Bank: Lehninger Principles of Biochemistry, 7th Edition, David L. Nelson Chapters 1-28.

Test Bank: Lehninger Principles of Biochemistry, 7th
Edition, David L. Nelson Chapters 1-28.

1. Inxaxbacterialxcell,xthexDNAxisxinxthe:
A) cellxenvelope.
B) cellxmembrane.
C) nucleoid.
D) nucleus.
E) ribosomes.


2. Axmajorxchangexoccurringxinxthexevolutionxofxeukaryotesxfromxprokaryotesxwasxthe
developmentxof:
A) DNA.
B) photosyntheticxcapability.
C) plasmaxmembranes.
D) ribosomes.
E) thexnucleus.


3. Inxeukaryotes,xthexnucleusxisxenclosedxbyxaxdoublexmembranexcalledxthe:
A) cellxmembrane.
B) nuclearxenvelope.
C) nucleolus.
D) nucleoplasm.
E) nucleosome.


4. Thexdimensionsxofxlivingxcellsxarexlimited,xonxthexlowerxendxbyxthexminimumxnumberxofx
biomoleculesxnecessaryxforxfunction,xandxonxthexupperxendxbyxthexratexofxdiffusionxof
solutesxsuchxasxoxygen.xExceptxforxhighlyxelongatedxcells,xtheyxusuallyxhavexlengthsxandx
diametersxinxthexrangexof:
A) 0.1xmxtox10xm.
B) 0.3xmxtox30xm.
C) 0.3xmxtox100xm.
D) 1xmxtox100xm.
E) 1xmxtox300xm.




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,5. Whichxgroupxofxsingle-celledxmicroorganismsxhasxmanyxmembersxfoundxgrowingxin
extremexenvironments?
A) bacteria
B) archaea
C) eukaryotes
D) heterotrophs
E) Nonexofxthexanswersxisxcorrect.


6. ThexbacteriumxE.xcolixrequiresxsimplexorganicxmoleculesxforxgrowthxandxenergy—itxis
thereforexa:
A) chemoautotroph.
B) chemoheterotroph.
C) lithotroph.
D) photoautotroph.
E) photoheterotroph.


7. Whichxisxaxlistxofxorganelles?
A) mitochondria,xchromatin,xendoplasmicxreticulum
B) peroxisomes,xlysosomes,xplasmaxmembrane
C) proteasomes,xperoxisomes,xlysosomes
D) mitochondria,xendoplasmicxreticulum,xperoxisomes
E) Allxofxthexanswersxarexcorrect.


8. WhichxlistxhasxthexcellularxcomponentsxarrangedxinxorderxofxINCREASINGxsize?
A) aminoxacidx<xproteinx<xmitochondrionx<xribosome
B) aminoxacidx<xproteinx<xribosomex<xmitochondrion
C) aminoxacidx<xribosomex<xproteinx<xmitochondrion
D) proteinx<xaminoxacidx<xmitochondrionx<xribosome
E) proteinx<xribosomex<xmitochondrionx<xaminoxacid


9. Thexthree-
dimensionalxstructurexofxmacromoleculesxisxformedxandxmaintainedxprimarilyxthroughxn
oncovalentxinteractions.x WhichxonexofxthexfollowingxisxNOTxconsideredxa
noncovalentxinteraction?
A) carbon-carbonxbonds
B) hydrogenxbonds
C) hydrophobicxinteractions
D) ionicxinteractions
E) vanxderxWaalsxinteractions




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,10. WhichxelementxisxNOTxamongxthexfourxmostxabundantxinxlivingxorganisms?
A) carbon
B) hydrogen
C) nitrogen
D) oxygen
E) phosphorus


11. Thexfourxcovalentxbondsxinxmethanex(CH4)xarexarrangedxaroundxcarbonxtoxgivexwhich
geometry?
A) linear
B) tetrahedral
C) trigonalxbipyramidal
D) trigonalxplanar
E) trigonalxpyramidal


12. Whatxfunctionalxgroupsxarexpresentxonxthisxmolecule?




A) etherxandxaldehyde
B) hydroxylxandxaldehyde
C) hydroxylxandxcarboxylicxacid
D) hydroxylxandxester
E) hydroxylxandxketone


13. Thexmacromoleculesxthatxservexinxthexstoragexandxtransmissionxofxgeneticxinformation
are:
A) carbohydrates.
B) lipids.
C) membranes.
D) nucleicxacids.
E) proteins.


14. Stereoisomersxthatxarexnonsuperimposablexmirrorximagesxofxeachxotherxarexknownxas:
A) anomers.
B) cis-transxisomers.
C) diastereoisomers.
D) enantiomers.
E) geometricxisomers.



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, 15. Thexcatalogxofxallxproteinsxfunctioningxinxaxcellxisxthe:
A) metabolome.
B) proteasome.
C) lysosome.
D) proteome.
E) genome.

AnswerxKey
1. B
2. D
3. D
4. C
5. E
6. A
7. B
8. D
9. E
10. E
11. D
12. A
13. D
14. A
15. A
16. C
17. B
18. C
19. A
20. D
21. B
22. C
23. D




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