lehninger principles of biochemistry 6thedition test_bank

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Multiple Choice Questions
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1. Cellularn foundations
Pages:n3-4n Difficulty:n1 Ans:nC
Innanbacterialncell,nthenDNAnisninnthe:

A) cellnenvelope.
B) celln membrane.
C) nucleoid.
D) nucleus.
E) ribosomes.

2. Cellularn foundations
Page:n 4 Difficulty:n 1 Ans:n E
Anmajornchangenoccurringninnthen evolutionnofneukaryotesnfromnprokaryotesnwasnthendevelo

A) DNA.
B) photosyntheticn capability.
C) plasmanmembranes.
D) ribosomes.
E) thennucleus.

3. Cellularn foundations
Page:n 4 Difficulty:n 1 Ans:n B
Inneukaryotes,nthennucleusnisnenclosednbynan doublenmembranencallednthe:

A) celln membrane.
B) nuclearnenvelope. @thebo
C) nucleolus.
D) nucleoplasm.
E) nucleosome.

4. Cellularn foundations
Page:n4 Difficulty:n 1 Ans:nC
Thendimensionsnofnlivingncellsnarenlimited,nonnthen lowernendnbynthenminimumnnumbern ofnb
ecessarynfornfunction,nandnonnthen uppernendnbynthenraten ofndiffusionnofnsolutesnsuchnasnox
Exceptnfornhighlynelongatedncells,ntheynusuallynhavenlengthsnandndiametersninnthen rangenof

A) 0.1nµmnton10nµm.
B) 0.3nµmnton30nµm.
C) 0.3nµmnton100nµm.
D) 1nµmnton100n µm.

,2 Chaptern 1n n Then Foundationsn o



5. Cellularn foundations
Page:n 5 Difficulty:n 2 Ans:n B
ThenbacteriumnE.ncolinrequiresnsimplenorganicnmoleculesnforngrowthnandn energy—itnisnthe

A) chemoautotroph.
B) chemoheterotroph.
C) lithotroph.
D) photoautotroph.
E) photoheterotroph.

6. Cellularn foundations
Page:n 10 Difficulty:n 2 Ans:n B
Whichnonenofnthenfollowingnhasnthencellularncomponentsnarrangedninnordernofn increasingn

A) Aminonacidn<nproteinn<n mitochondrionn<nribosome
B) Aminonacidn<nproteinn<nribosomen<nmitochondrion
C) Aminonacidn<nribosomen<nproteinn<nmitochondrion
D) Proteinn<naminonacidn<n mitochondrionn<nribosome
E) Proteinn<nribosomen<nmitochondrionn<naminonacid

7. Cellularn foundations
Page:n 11 Difficulty:n 2 Ans:n A
Thenthree-
dimensionalnstructurenofnmacromoleculesnisnformednandnmaintainednprimarilynthroughnno
ractions.n Whichnonenofnthenfollowingnisn notnconsiderednannoncovalentninteraction?

A) carbon-carbon n bonds
B) hydrogennbonds
C) hydrophobicninteractions
D) ionicninteractions
E) vanndernWaalsninteractions

8. Chemicalnfoundations
Page:n 12 Difficulty:n 2 Ans:n E
Whichnonenofnthenfollowingnisn notnamongnthenfourn mostnabundantnelementsninnlivingnorgan

A) Carbon
B) Hydrogen
C) Nitrogen
D) Oxygen
E) Phosphorus

9. Chemicalnfoundations
Page:n 13 Difficulty:n 1 Ans:n B
Thenfourncovalentnbondsninnmethanen(CHn4)narenarrangednaroundncarbonntongivenwhichnone
ngngeometries?

, Chaptern 1n n Then Foundationsn ofn Biochemistry



10. Chemicalnfoundations
Page:n 14 Difficulty:n 1 Ans:n B
Whatnfunctionalngroupsnarenpresentnonnthisnmolecule?




A) ethernandnaldehyde
B) hydroxyln andn aldehyde
C) hydroxylnandncarboxylicnacid
D) hydroxyln andn ester
E) hydroxyln andn ketone

11. Chemicalnfoundations
Page:n 16 Difficulty:n 1 Ans:n D
Thenmacromoleculesnthatnserveninnthenstoragen andntransmissionnofngeneticninformationnare

A) carbohydrates.
B) lipids.
C) membranes.
D) nucleicnacids.
E) proteins.

12. Chemicalnfoundations
Page:n 17 Difficulty:n 1 Ans:n D
Stereoisomersnthatnarennonsuperimposablenmirrornimagesnofneachnothern arenknownnas:

A) anomers.
B) cis-transnisomers.
C) diastereoisomers.
D) enantiomers.
E) geometricn isomers.

13. Chemicalnfoundations
Page:n 20 Difficulty:n 3 Ans:n E
Thenenzymenfumarasencatalyzesnthen reversiblenhydrationnofnfumaricnacidntonl-
malate,n butnitnwillnnotncatalyzenthenhydrationnofnmaleicnacid,nthencisnisomernofnfumaricna
examplenof:

A) biologicalnactivity.
B) chiralnactivity.
C) racemization.
D) stereoisomerization.
E) stereospecificity.