BIOCHEMISTRY EXAM 3 QUESTIONS AND CORRECT ANSWERS

BIOCHEMISTRY EXAM 3 QUESTIONS
AND CORRECT ANSWERS
WhichA2ofA2theseA2bothA2increasesA2theA2transitionA2temperatureA2ofA2cellularA2membran
esA2atA2highA2temperaturesA2whileA2alsoA2decreasingA2theirA2transitionA2temperatureA2atA2
veryA2lowA2temperatures?
-UnsaturatedA2FattyA2Acids
-SaturatedA2FattyA2Acids
-Phospholipids
-CholesterolA2-A2Ans--Cholesterol

TheA2correctA2systematicA2nameA2forA2theA2fattyA2acidA2belowA2is:
-9A2octadecatrienoicA2acid
-9,12,15A2octadecatrienoicA2acid
-3,A26,A29A2octadecatrienoicA2acid
-3A2octadecatrienoicA2acidA2-A2Ans--9,12,15A2octadecatrienoic

TriglyceridesA2areA2comprisedA2ofA2glycerolA2plusA2____A2fattyA2acids,A2andA2areA2____A2c
omparedA2toA2fattyA2acids.
-2;A2moreA2polar
-2;A2lessA2polar
-3;A2lessA2polar
-3;A2moreA2polarA2-A2Ans--3,A2lessA2polar

DolicholA2isA2derivedA2fromA2____A2andA2isA2aA2carrierA2for_____.
-Isoprenes;A2oligosaccharides
-CoenzymeA2Q.A2electrons
-AA2fattyA2acids;A2oligosaccharides
-Cholesterol;A2electronsA2-A2Ans--Isoprenes,A2olgiosaccharies

ThisA230-
carbonA2compoundA2derivedA2fromA2isoprene,A2whichA2servesA2asA2aA2precursorA2toA2ma
nyA2otherA2lipidsA2is:
-Squalene
-Retinol
-Retinal
-ArachidonicA2acidA2-A2Ans--Squalene

InA2whichA2readingA2frameA2willA2thisA2mRNAA2beA2read?
5'-A2AA2CA2AA2GA2CA2CA2UA2GA2CA2AA2AA2GA2UA2CA2AA2CA2UA2GA2AA2CA2GA2-A23'
-NoneA2ofA2these
-Third
-First
-SecondA2-A2Ans--NoneA2ofA2these

, HistoneA2proteinsA2areA2richA2inA2aminoA2acids
-LysineA2andA2Asparagine
-GlutamineA2andA2Asparagine
-LysineA2andA2Arginine
-Lysine,A2Arginine,A2andA2HistidineA2-A2Ans--LysineA2andA2Arginine

WhichA2ofA2theA2followingA2isA2NOTA2trueA2regardingA2theA2geneticA2codeA2andA2translatio
n?
-MultipleA2aminoA2acidsA2mayA2beA2codedA2forA2byA2aA2singleA2codon.
-AnA2mRNAA2isA2typicallyA2translatedA2onA2onlyA21A2readingA2frame.
-ThereA2areA264A2differentA2codons
-
mRNAA2sequenceA2isA2theA2reverseA2complementA2ofA2theA2templateA2strandA2ofA2DNA.A2
-A2Ans--MultipleA2aminoA2acidsA2mayA2beA2codedA2forA2byA2aA2singleA2codon.

TheA2sizeA2ofA2aA2eukaryoticA2cellA2nucleusA2isA2approximatelyA210A2μMA2inA2diameter,A2a
ndA2humanA2chromosomeA21A2isA2approximatelyA21,00,000A2μMA2long.A2GivenA2thisA2infor
mation,A2weA2needA2toA2foldA2chromosomeA21A2approximatelyA2_________A2foldA2soA2that
A2itA2canA2fitA2intoA2theA2nucleus.
-10,000A2times
-320A2times
-1,000,000A2times
-10A2timesA2-A2Ans--10,000A2times

TheA2approximateA2protein:A2lipidA2ratioA2inA2theA2innerA2mitochondrialA2membraneA2is:
-1:10
-3:1
-1:4
-1:1A2-A2Ans--3:1

BileA2saltsA2areA2derivedA2fromA2____A2andA2areA2_____.
-FattyA2acids;A2carriersA2forA2oligosaccharides
-Isoprene;A2biologicalA2detergents
-Cholesterol;A2electronA2carriers
-FattyA2Acids;A2electronA2carriersA2-A2Ans--Isoprene,A2biologicalA2detergents

TheA2symbolA2forA2theA2fattyA2acidA2belowA2is:
CH3(CH2)3CH=CH(CH2)7COOH
-14:1,A2n-5
-14:1,A2n-6
-14:0,A2n-5
-14:1,A2n-4A2-A2Ans--14:1,A2n-5

TheA2symbolA2forA2theA2fattyA2acidA2shownA2belowA2is:
CH3CH2(CH=CHCH2)3(CH2)6COOH