The price of a 20" television changed
from $450 to $400. Find the percentage
change in price. A. -10%
B. -11%
C. -13%
D. -15%
Which of the following is not a type of
natural lipid?
A. Supersaturated
B. Polyunsaturated
C. Saturated
D. Unsaturated
Correct answer: -11%
Change in price: 45...
ATITEASTESTPRACTICE
1/16Thepriceofa20"televisionchanged
from$450to$400.Findthepercentage
changeinprice.
A.
-10%
B.
-11%
C.
-13%
D.
-15%
Whichofthefollowingisnotatypeof
naturallipid?
A.
Supersaturated
B.
Polyunsaturated
C.
Saturated
D.
UnsaturatedCorrectanswer:-11%
Changeinprice:450-400=50
Todeterminethepercentagechange,di-
videthechangeinpricebytheinitial
price:
50=0.1111
450
Multiplyby100todeterminethepercent-
age:0.1111×100=11.11%
Becausethepricedecreased,the
changeinpriceisnegative:-11.11%,or
about-11%
Correctanswer:Supersaturated
Therearethreetypesofnaturallipids:
unsaturated,polyunsaturated,andsatu-
rated.Supersaturationisanotanaturally
occurringlipid.
Unsaturatedandpolyunsaturatedlipids
haveoneormoredoublebondsbetween
carbonatomsoffattyacidchains;satu-
ratedlipidssharenosuchdoublebonds.
Acommonexampleofsupersaturation
isrockcandy,whichiscreatedfroma
supersaturatedsugarsolution. ATITEASTESTPRACTICE
2/16Whichofthefollowingisnottrueofmito-
sis?
A.
Daughtercellsaredifferentthanparent
cells
B.
Daughtercellsareidenticaltoparent
cells
C.
Itproducesdaughtercells
D.
Itoccursonlyineukaryoticcells
WhatistheroleoftheGolgiapparatusin
thecell?Correctanswer:Daughtercellsarediffer-
entthanparentcells
Mitosisisacellcycleduringwhichapar-
entcellproducesanidenticaldaughter
cell.Ithasfourmainphases:prophase,
metaphase,anaphase,andtelophase.
Sincetheparentanddaughtercellsare
identical,bothdiploidsandhaploidscan
undergomitosis.
Mitosisisafour-stageprocessthatcre-
atestwoidenticalcellsfromoneoriginal
cell.
Prophaseisthefirstandlongeststageof
mitosis.Inthisstage,thechromosomes
becomevisibleandthecentriolessepa-
rateandmovetooppositepolesofthe
cell.
Metaphaseisthesecondstageofmito-
sis.Inthisstage,thechromosomesline
upacrossthecenterofthecellandbe-
comeconnectedtothespindlefiberat
theircentromere.
Anaphaseisthethirdstageofmitosis.
Inthisstage,thesisterchromatidssep-
arateintoindividualchromosomesand
arepulledapart.
Telophaseisthefourthandlaststageof
mitosis.Duringthisstage,thechromo-
somesgatheratoppositeendsofthecell
andlosetheirdistinctrod-likeshapes.
Twonewnuclearmembranesthenform
aroundeachofthetworegionsofDNA
andthespindlefibersdisappear.
Correctanswer:Toprovidetransporta-
tionofmaterialsthroughoutthecell ATITEASTESTPRACTICE
3/16A.
Touptakefoodthroughthecellmem-
brane
B.
Toproducecellularrespiration
C.
Toprovideintracellulardigestion
D.
Toprovidetransportationofmaterials
throughoutthecell
Whenhydrocarbonisheated,itsprod-
uctsarecarbondioxideandwater.This
isanexampleofwhichofthefollowing?
A.
Decomposition
B.
Combustion
C.
Singlereplacement
D.
Synthesis
Whenisadoublecovalentbondformed?
A.
Whentwoelectronpairsaresharedbe-
tweentwoatoms
B.TheGolgiapparatusisresponsiblefor
thetransportationofmaterialsthrough-
outthecell.TheGolgiapparatus,also
knownastheGolgicomplex,Golgibody,
orsimplytheGolgi,isanorganellefound
inmosteukaryoticcells.
Intracellulardigestionoccurswithinlyso-
somes.Uptakingfoodisthejobofvac-
uoles.Cellularrespirationisthefunction
ofmitochondria.
Correctanswer:Combustion
Anexampleofcombustioniswhenhy-
drocarbonisheatedanditsproductsare
carbondioxideandwater.Combustion
isanexothermicchemicalreactionthat
occurswhenheatactsonoxygenora
fuelcompound.
Synthesisisareactionthatcausestwo
elementstojointoformoneproduct.De-
compositionoccurswhenacompoundis
brokendownintoitscomponentparts.
Singlereplacementoccurswhenanac-
tivemetalreactswithanioniccompound
thatcontainsalessactivemetaltoform
anewcompound.
Correctanswer:Whentwoelectronpairs
aresharedbetweentwoatoms
Adoublecovalentbondisformedwhen
twoelectronpairsaresharedbetween
twoatoms.Ageneralcovalentbondis
formedwhentwoatomssharetheirelec-
trons.Covalentbondsarethestrongest
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