Lehninger Principles of Biochemistry Test Bank – 2025 Edition

k

,1. Inkakbacterialkcell,kthekDNAkiskinkthe
:
A) cellkenvelope.
B) cellkmembrane.
C) nucleoid.
D) nucleus.
E) ribosomes.


2. Akmajorkchangekoccurringkinkthekevolutionkofkeukaryoteskfromkprokaryoteskwaskth
e
developmentkof:
A) DNA.
B) photosynthetickcapability.
C) plasmakmembranes.
D) ribosomes.
E) theknucleus.


3. Inkeukaryotes,ktheknucleuskiskenclosedkbykakdoublekmembranekcalledkthe
:
A) cellkmembrane.
B) nuclearkenvelope.
C) nucleolus.
D) nucleoplasm.
E) nucleosome.


4. Thekdimensionskofklivingkcellskareklimited,konktheklowerkendkbykthekminimumknumberk
ofkbiomoleculesknecessarykforkfunction,kandkonkthekupperkendkbykthekratekofkdiffusionk
ofksolutesksuchkaskoxygen.kExceptkforkhighlykelongatedkcells,ktheykusuallykhaveklengths
kandkdiameterskinkthekrangekof:
A) 0.1kmktok10km.
B) 0.3kmktok30km.
C) 0.3kmktok100km.
D) 1kmktok100km.
E) 1kmktok300km.


5. Whichkgroupkofksingle-
celledkmicroorganismskhaskmanykmemberskfoundkgrowingkin
extremekenvironments?
A) bacteria
B) archaea
C) eukaryotes
D) heterotrophs
E) Nonekofkthekanswerskiskcorrect.

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, 6. ThekbacteriumkE.kcolikrequiresksimplekorganickmoleculeskforkgrowthkandkenergyóitki
s
thereforeka:
A) chemoautotroph.
B) chemoheterotroph.
C) lithotroph.
D) photoautotroph.
E) photoheterotroph.


7. Whichkiskaklistkofkorganelles?
A) mitochondria,kchromatin,kendoplasmickreticulum
B) peroxisomes,klysosomes,kplasmakmembrane
C) proteasomes,kperoxisomes,klysosomes
D) mitochondria,kendoplasmickreticulum,kperoxisomes
E) Allkofkthekanswerskarekcorrect.


8. WhichklistkhaskthekcellularkcomponentskarrangedkinkorderkofkINCREASINGksize
?
A) aminokacidk<kproteink<kmitochondrionk<kribosome
B) aminokacidk<kproteink<kribosomek<kmitochondrion
C) aminokacidk<kribosomek<kproteink<kmitochondrion
D) proteink<kaminokacidk<kmitochondrionk<kribosome
E) proteink<kribosomek<kmitochondrionk<kaminokacid


9. Thekthree-
dimensionalkstructurekofkmacromoleculeskiskformedkandkmaintainedkprimarilykthroughk
noncovalentkinteractions.k WhichkonekofkthekfollowingkiskNOTkconsideredka
noncovalentkinteraction?
A) carbon-carbonkbonds
B) hydrogenkbonds
C) hydrophobickinteractions
D) ionickinteractions
E) vankderkWaalskinteractions


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




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, 11. Thekfourkcovalentkbondskinkmethanek(CH4)karekarrangedkaroundkcarbonktokgivekwhic
hkgeometry?
A) linear
B) tetrahedral
C) trigonalkbipyramidal
D) trigonalkplanar
E) trigonalkpyramidal


12. Whatkfunctionalkgroupskarekpresentkonkthiskmolecule?




A) etherkandkaldehyde
B) hydroxylkandkaldehyde
C) hydroxylkandkcarboxylickacid
D) hydroxylkandkester
E) hydroxylkandkketone


13. Thekmacromoleculeskthatkservekinkthekstoragekandktransmissionkofkgenetickinformatio
n
are:
A) carbohydrates.
B) lipids.
C) membranes.
D) nucleickacids.
E) proteins.


14. Stereoisomerskthatkareknonsuperimposablekmirrorkimageskofkeachkotherkarekknownkas
:
A) anomers.
B) cis-transkisomers.
C) diastereoisomers.
D) enantiomers.
E) geometrickisomers.




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