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NWHSU Biochemistry 1 Exam 1 Prep Questions and Answers
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NWHSU Biochemistry 1 Exam 1 PrepQuestions and Answers
What iiare iithe iifour iibio iimolecules? ii- iiAnswers ii-Amino iiacids/proteins ii
Carbohydrates ii
Nucleotides/Nucleic iiacids ii
Lipids
The iisolvent iiin iibio iichemistry iiis iiwhat? ii- iiAnswers ii-Water
Zwitter iiion ii- iiAnswers ii-has iia iipositive iiand iinegative iicharge
True iior iifalse: iiMost iiamino iiacids iiare iichiral iicompounds? ii- iiAnswers ii-True!
(exception ii= iiglycine)
Alpha iiamino iiacids iiconsist iiof iia ii____ iiand iia ii____ ii- iiAnswers ii-amine iiand iia iiCOO-
iigroup
aromatic iiamino iiacids iiabsorb_____ ii- iiAnswers ii-UV iilight ii=280nm
Aromatic iiR iigroups? ii- iiAnswers ii-Tyrosine, iiPhenylalanine, iiTryptophan
(TPT)
Positively iiCharged iiR iigroups ii- iiAnswers ii-Histidine, iiArginine, iiLysine
(HAL)
Negatively iiCharged iiR iigroups ii- iiAnswers ii-Aspartate, iiGlutamate
Nonpolar iialaphatic iiR iigroups ii- iiAnswers ii-Leucine, iiIso-Leucine, iiAlanine, iiGlycine,
iiProline, iiValine, iiMethionine ii
(hydrophobic)
Polar, iiUncharged iiR iigroups ii- iiAnswers ii-Serine, iiThreonine, iiCysteine, iiAsparagine,
iiGlutamine ii
(Hydrogen iiBonding)
Essential iiAmino iiAcids ii- iiAnswers ii-Valine, iiLeucine, iiIsoleucine, iiMethionine,
iiThreonine, iiPhenylalanine, iiTryptophan, iiLysine
DNA------------>Proteins ii- iiAnswers ii-expression
, DNA------>mRNA-------> ii- iiAnswers ii-Transcription, iiTranslation
Uncommon, ii21st iiamino iiacid ii- iiAnswers ii-selenocysteine
Metabolites ii- iiAnswers ii-Citrulline, iiOrnothine, iiCarnitine, iiCreatine
L-Citrulline iiand iiOrnithine ii- iiAnswers ii-Intermediates iiof iiurea iicycle
Carnitine ii- iiAnswers ii-Transfers iifatty iiacid iiacross iimembranes iiinto iimitochondria iiso iiit
iican iibe iiused iifor iienergy iiproduction
Taurine: ii- iiAnswers ii-Bile iiacid ii(acts iilike iisoap iiand iibreaks iiup iiFA) iiHelps iiaid iiin
iidigestion
Creatine: ii- iiAnswers ii-Intermediate iistorage iiof iienergy iiin iimuscles ii(skeletal)
Calculating iiPI ii- iiAnswers ii-Neutral iiPI= ii(pka1+pka2)/2
iiBasic: iiPI ii=(pkR+pk2)/2
Acidic: iiPI ii=(pkR+pk1)/2
Non iicovalent(weak iiinteractions) iiin iiaqueous iisolutions: ii- iiAnswers ii-Hydrogen
iiBonding ii
Ionic iiBonding ii
Hydrophobic iiInteraction ii(nonpolar iifunction iigroups iiassociate iiwith iieach iiother, iiwant
iito iiget iiaway iifrom iiH20) ii
Vander iiwaals iiforces
Proline: ii- iiAnswers ii-Only iione iiwhere iiR iigroup iiforms iiring iiwith iialpha iiamino iigroup
Glycine iiis iichiral, iitrue iior iifalse? ii- iiAnswers ii-False
Methionine: ii- iiAnswers ii-Contains iisulfur
iiThio iiether
Cysteine: ii- iiAnswers ii-Second iiamino iiacid iiwhich iicontains iisulfur. ii2 iicysteine-->
iidisulfide iibond ii(helps iistabilize iiprotein)
A280 iiis iiused iito iiestimate iithe iiconcentration iiof iiwhat? ii- iiAnswers ii-Protein
iiconcentration
Positively iiCharged iiR iigroups ii- iiAnswers ii-Nitrogen iicontaining iiR iigroups, iiare iibasic
iiin iinature iiand iican iiget iipositively iicharged iiwhen iipronated ii
Basic iiamino iiacids
Histidine: ii- iiAnswers ii-Very iioften iifound iiat iithe iiactive iisite iiof iienzymes. iiEnzymes iiare
iiproteins iithat iifunction iias iicatalysts iibecause iipkR iiis iiclose iito ii7
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