Penn Foster Biology Exam Questions
And Answers
Cell n- nAnswer n- nIs nthe nsmallest nunit nof nbiological norganization nthat ndisplays nall nof nthe
ncharacteristics nof nlife
Order nof nbiological norganization n- nAnswer n- npopulation, ncommunity, necosystem, nand nbiosphere
A nmodification nthat nmakes norganisms nmore nsuited nto ntheir nenvironment nis ncalled na/an n-
nAnswer n- nadaptation
The nlife ndomain nwhose nmembers nlive nin nvery nharsh nenvironments, nsuch nas nsalt nlakes nand nhot
nsprings, nis n- nAnswer n- nArchaea
During na nscientific nexperiment, nthe ncontrol ngroup nis n- nAnswer n- nidentical nto nthe nexperimental
ngroup nin nall nareas nexcept nthe nvariable nbeing ntested.
The n_______ nis na nsubatomic nparticle nthat ncarries na npositive nelectrical ncharge. n- nAnswer n-
nProton
When nan natom nhas ntwo nor nmore nelectron nshells, nthe nouter nshell nwill nbe nmost nstable nif nit
ncontains neight nelectrons. nThis nconcept nis ncalled nthe n- nAnswer n- nOctet nrule
When ntwo noxygen natoms njoin ntogether, na n_______ nis nformed. n- nAnswer n- nMolecule
The n_______ nbond nis na ntype nof natomic nbond nin nwhich natoms nshare nelectrons nto nproduce na
ncompleted nouter nshell. n- nAnswer n- nCovalent
,The npolarity nof nwater nmolecules ncauses nthem nto nbe nattracted nto none nanother nby na n_______
nbond. n- nAnswer n- nHydrogen
As nthe nnumber nof nhydrogen nions nin na nsolution nincreases, nthe npH nof nthe nsolution n- nAnswer n-
nDecreases
During nwinter, nonly nthe nupper nsurface nof na nlake nfreezes, nwhich nallows nfor nlife nto npersist nbelow
nthe nsurface. nWhich nof nwater's nunique nproperties nis nresponsible nfor nthis nphenomenon? n-
nAnswer n- nLower ndensity nas nice
The nmost nabundant nelement nby nweight nin nthe nhuman nbody nis n- nAnswer n- nOxygen
The npolysaccharide nstructural ncarbohydrate nmost ncommonly nused nby nliving nthings nis n- nAnswer n-
nCellulose
Which none nof nthe nfollowing nfunctional ngroups nis nassociated nwith nfatty nacids? n- nAnswer n-
nCarboxyl
The nhard nbody nparts nof ninsects nand ncrabs nare ncomposed nof na npolysaccharide ncalled n- nAnswer n-
nChitin
Cell nmembranes nare ncomposed nmainly nof nwhich ntype nof nlipids? n- nAnswer n- nPhospholipids
_______ nproteins nare nmade nof npolypeptide nchains nfolded ninto nrounded ncompact nshapes. n-
nAnswer n- nGlobular
When njoined nby na ndehydration nreaction, nthe ncovalent nbond nbetween nthe ncarboxyl ngroups nof
ntwo namino nacids nis ncalled na n_______ nbond. n- nAnswer n- nPeptide
The nsugar nin nRNA nis n- nAnswer n- nRibose
Within ncells, nthe nsynthesis nof nproteins noccurs nin nthe n- nAnswer n- nRibosomes
, What nis nthe nmain nfunction nof nthe nmitochondria? n- nAnswer n- nProducing nATP
The n_______ nkeep(s) nthe ncytoplasm nof neukaryotic ncells nseparate nfrom nthe nDNA. n- nAnswer n-
nNuclear nenvelope
Organelles nthat nuse nsolar nenergy nto nmake ncarbohydrates nare ncalled n- nAnswer n- nChloroplasts
The n_______ nare nsometimes ncalled nthe n"powerhouses" nof nthe ncell. n- nAnswer n- nMitochondria
The ncell-to-cell njunctions nthat nallow ncells nto ncommunicate nare ncalled n_______ njunctions. n-
nAnswer n- nGap
In na/an n_______ nreaction, none nreaction nreleases nenergy nand nthe nsecond nuses nenergy. n- nAnswer
n- nCoupled
Which nof nthe nfollowing nis nnot na nfeature nof nenzymes? n- nAnswer n- nMetabolic nreactions ndestroy
nthe nenzyme nmolecules
The nterm nentropy nrefers nto n- nAnswer n- nthe nrelative namount nof ndisorganization nin na nsystem
The nterm nphagocytosis nrefers nto na ntype nof n- nAnswer n- nEndocytosis
_______ nis nthe nmovement nof nwater nacross na nsemipermeable nmembrane nfrom nan narea nof
nhigher nconcentration nto nan narea nof nlesser nconcentration. n- nAnswer n- nOsmosis
In nthe nelectron npathway nfor nlight nreactions nin nphotosynthesis, nPS nII ninvolves n- nAnswer n-
nSplitting nwater
A nplant nthat nabsorbs nblue-violet-green nwavelengths nof nlight nwill nreflect nwhat ncolor? n- nAnswer n-
nYellow-orange
And Answers
Cell n- nAnswer n- nIs nthe nsmallest nunit nof nbiological norganization nthat ndisplays nall nof nthe
ncharacteristics nof nlife
Order nof nbiological norganization n- nAnswer n- npopulation, ncommunity, necosystem, nand nbiosphere
A nmodification nthat nmakes norganisms nmore nsuited nto ntheir nenvironment nis ncalled na/an n-
nAnswer n- nadaptation
The nlife ndomain nwhose nmembers nlive nin nvery nharsh nenvironments, nsuch nas nsalt nlakes nand nhot
nsprings, nis n- nAnswer n- nArchaea
During na nscientific nexperiment, nthe ncontrol ngroup nis n- nAnswer n- nidentical nto nthe nexperimental
ngroup nin nall nareas nexcept nthe nvariable nbeing ntested.
The n_______ nis na nsubatomic nparticle nthat ncarries na npositive nelectrical ncharge. n- nAnswer n-
nProton
When nan natom nhas ntwo nor nmore nelectron nshells, nthe nouter nshell nwill nbe nmost nstable nif nit
ncontains neight nelectrons. nThis nconcept nis ncalled nthe n- nAnswer n- nOctet nrule
When ntwo noxygen natoms njoin ntogether, na n_______ nis nformed. n- nAnswer n- nMolecule
The n_______ nbond nis na ntype nof natomic nbond nin nwhich natoms nshare nelectrons nto nproduce na
ncompleted nouter nshell. n- nAnswer n- nCovalent
,The npolarity nof nwater nmolecules ncauses nthem nto nbe nattracted nto none nanother nby na n_______
nbond. n- nAnswer n- nHydrogen
As nthe nnumber nof nhydrogen nions nin na nsolution nincreases, nthe npH nof nthe nsolution n- nAnswer n-
nDecreases
During nwinter, nonly nthe nupper nsurface nof na nlake nfreezes, nwhich nallows nfor nlife nto npersist nbelow
nthe nsurface. nWhich nof nwater's nunique nproperties nis nresponsible nfor nthis nphenomenon? n-
nAnswer n- nLower ndensity nas nice
The nmost nabundant nelement nby nweight nin nthe nhuman nbody nis n- nAnswer n- nOxygen
The npolysaccharide nstructural ncarbohydrate nmost ncommonly nused nby nliving nthings nis n- nAnswer n-
nCellulose
Which none nof nthe nfollowing nfunctional ngroups nis nassociated nwith nfatty nacids? n- nAnswer n-
nCarboxyl
The nhard nbody nparts nof ninsects nand ncrabs nare ncomposed nof na npolysaccharide ncalled n- nAnswer n-
nChitin
Cell nmembranes nare ncomposed nmainly nof nwhich ntype nof nlipids? n- nAnswer n- nPhospholipids
_______ nproteins nare nmade nof npolypeptide nchains nfolded ninto nrounded ncompact nshapes. n-
nAnswer n- nGlobular
When njoined nby na ndehydration nreaction, nthe ncovalent nbond nbetween nthe ncarboxyl ngroups nof
ntwo namino nacids nis ncalled na n_______ nbond. n- nAnswer n- nPeptide
The nsugar nin nRNA nis n- nAnswer n- nRibose
Within ncells, nthe nsynthesis nof nproteins noccurs nin nthe n- nAnswer n- nRibosomes
, What nis nthe nmain nfunction nof nthe nmitochondria? n- nAnswer n- nProducing nATP
The n_______ nkeep(s) nthe ncytoplasm nof neukaryotic ncells nseparate nfrom nthe nDNA. n- nAnswer n-
nNuclear nenvelope
Organelles nthat nuse nsolar nenergy nto nmake ncarbohydrates nare ncalled n- nAnswer n- nChloroplasts
The n_______ nare nsometimes ncalled nthe n"powerhouses" nof nthe ncell. n- nAnswer n- nMitochondria
The ncell-to-cell njunctions nthat nallow ncells nto ncommunicate nare ncalled n_______ njunctions. n-
nAnswer n- nGap
In na/an n_______ nreaction, none nreaction nreleases nenergy nand nthe nsecond nuses nenergy. n- nAnswer
n- nCoupled
Which nof nthe nfollowing nis nnot na nfeature nof nenzymes? n- nAnswer n- nMetabolic nreactions ndestroy
nthe nenzyme nmolecules
The nterm nentropy nrefers nto n- nAnswer n- nthe nrelative namount nof ndisorganization nin na nsystem
The nterm nphagocytosis nrefers nto na ntype nof n- nAnswer n- nEndocytosis
_______ nis nthe nmovement nof nwater nacross na nsemipermeable nmembrane nfrom nan narea nof
nhigher nconcentration nto nan narea nof nlesser nconcentration. n- nAnswer n- nOsmosis
In nthe nelectron npathway nfor nlight nreactions nin nphotosynthesis, nPS nII ninvolves n- nAnswer n-
nSplitting nwater
A nplant nthat nabsorbs nblue-violet-green nwavelengths nof nlight nwill nreflect nwhat ncolor? n- nAnswer n-
nYellow-orange
