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WGU C785 Biochemistry Unit Questions With Correct Answers
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BioChem C785
WGU C785 Biochemistry Unit Questions With Correct Answers
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WGU C785 Biochemistry Unit
Questions With Correct Answers
Which clevel cof cprotein cstructure cis cdisrupted cthrough cthe chydrolysis cof cpeptide
cbonds?
Quaternary
Tertiary
Primary
Secondary c- ccorrect canswers✔✔Primary
The cprimary cstructure cof ca cprotein cis cthe csequence cof camino cacids cheld ctogether
cby cpeptide cbonds. cPeptide cbonds care cformed cby cdehydration creactions cand
cdisrupted cby chydrolysis.
A cmutation cin cthe cbeta-hemoglobin cgene, cwhich cresults cin cthe creplacement cof cthe
camino cacid cglutamate cin cposition c6 cwith cthe camino cacid cvaline, cleads cto cthe
cdevelopment cof csickle ccell canemia. cThe cstructures cof cglutamate cand cvaline care
cshown cbelow.
If cthe cbeta chemoglobin cgene cin ca cpatient cwith csickle-cell canemia cwere cto cbe
cedited cso cthat cthe cvaline cin cposition c6 cwas creplaced cwith ca cdifferent camino cacid,
cwhich creplacement cfor cvaline cwould cbe cexpected cto chave cthe cbest cclinical
coutcome, cin ctheory, cfor cthe cpatient? c(Assume cthe cvaline ccan cpotentially cbe
creplaced cwith cany camino cacid cother cthan cglutamate.) c- ccorrect canswers✔✔The
coriginal camino cacid cin ca chealthy cpatient cis cglutamate, cwhich cis cnegatively
ccharged. cThe cmutated camino cacid cis cvaline, cwhich cis cnon-polar. cValine cis ccausing
csickle ccell canemia. cThe cbest camino cacid cto creplace cvaline cso cthat cthe cpatient cis
chealthy cagain cwould cbe cthe cone cmost clike cglutamate, cso cany cnegatively ccharged
camino cacid.
Secondary, ctertiary, cand cquaternary clevels cof cprotein cstructure ccan call cbe cimpacted
cby cexposing ca cprotein cto cwhich ctreatment?
Change cof ca chydrophobic camino cacid cto ca cdifferent chydrophobic camino cacid
Addition cof ca creducing cagent
,Placement cof cthe cprotein cin ca csolution cwith ca clow cpH
Increase cin cthe cconcentration cof cthe cprotein cin csolution c- ccorrect
canswers✔✔Placement cof cthe cprotein cin ca csolution cwith ca clow cpH
Changes cin cpH caffect chydrogen cbonds cand cionic cbonds. cHydrogen cbonds cin cthe
cbackbone cof camino cacids coccur cin csecondary cstructure, cand cboth chydrogen cbonds
cand cionic cbonds coccur cin cthe cside cchains cof camino cacids cin ctertiary cstructure.
An cincrease cin cbeta-pleated csheet cstructure cin csome cbrain cproteins ccan clead cto can
cincrease cin camyloid cdeposit cformation, ccharacteristic cof csome cneurodegenerative
cdiseases. cWhat cis cthe cprimary cbiochemical cprocess cthat cfollows cthe cincrease cin
cbeta-pleated csheet cstructure cthat cleads cto cthe cdevelopment cof cthe camyloid
cdeposits?
An cincrease cin cglycogen cformation cin cthe cbrain ccells
Aggregation cof cthe cproteins cin cthe cbrain
Secretion cof cglucagon, cleading cto cexcessive cketogenesis
An cincrease cin canaerobic cmetabolism cof cglucose cin cthe cbrain c- ccorrect
canswers✔✔Aggregation cof cthe cproteins cin cthe cbrain
This cquestion cis cdescribing cchanges cin cprotein cstructure. cAggregation coccurs cwhen
cproteins cclump ctogether cinappropriately, ccausing cplaques clike camyloid cdeposits cto
caccumulate.
Which clevel cof cprotein cstructure cis cdetermined cby cthe csequence cof camino cacids?
Secondary cstructure
Quaternary cstructure
Tertiary cstructure
Primary cstructure c- ccorrect canswers✔✔Primary cstructure
The cprimary cstructure cof ca cprotein cis csimply cthe csequence cof camino cacids cheld
ctogether cby cpeptide cbonds.
Which cforce cis cmost cinfluential cin cdetermining cthe csecondary cstructure cof ca
cprotein?
Hydrophobic ceffect
, Disulfide cbonding
Hydrogen cbonding
Electrostatic cinteractions c- ccorrect canswers✔✔Hydrogen cbonding
The csecondary cstructure cof ca cprotein cis cbuilt cby chydrogen cbonds cbetween cthe
ccarboxyl cgroups cand camino cgroups con cthe cbackbones cof cthe camino cacids.
Which camino cacid cwould cmost clikely cparticipate cin chydrogen cbonds? c- ccorrect
canswers✔✔Amino cAcid cstructure c4
This cis ca cpolar, cuncharged camino cacid cdue cto cthe cOH cgroup con cthe cside cchain.
cPolar, cuncharged camino cacids ccontaining coxygen cor cNH cgroups cmake chydrogen
cbonds.
Which cportion cof cthe camino cacid cis cinside cthe cbox?
c
The cbox cis csurrounding cthe csection cbelow cthe cAlpha cCarbon c- ccorrect
canswers✔✔Side cChain
The cside cchain cis cthe cvariable cgroup cof cthe camino cacid, calso ccalled cthe cR cgroup.
cEvery camino cacid chas cthe csame camino cgroup, ccarboxylic cacid cgroup, cand can
calpha ccarbon, cbut cthe cside cchain cis cdifferent.
Which cpair cof camino cacids cwill cmost clikely cinteract cthrough chydrophobic cforces
cbetween ctheir cside cchains? c- ccorrect canswers✔✔Both cof cthese camino cacids care
cnon-polar cand ctherefore ccan cinteract ctogether cwith ca chydrophobic cinteraction.
cPlease cnote cthat cthe c"S" cin cthe camino cacid con cthe cright cis cnon-polar, cwhile cthe
c"SH" cgroup cin canswer cchoice cD cis cpolar. cThe cS cmust chave can cH cto cbe cpolar
cand cis cotherwise cnon-polar.
Which cportion cof cthe camino cacid cis cinside cthe cbox?
The cbox cis cover cthe cCarbon cat cthe cCenter cof cthe cchain c- ccorrect
canswers✔✔Alpha cCarbon
The calpha ccarbon cis cthe ccentral ccarbon con can camino cacid cthat cholds ctogether cthe
cother cgroups cof cthe camino cacid. cIt cis calways cattached cto cthe camino cgroup, cthe
ccarboxyl cgroup, cthe cside cchain, cand ca csingle chydrogen. cIt cis cpart cof cthe cbackbone
cof cthe camino cacid cand cis cfound cin cevery camino cacid.
Given cthe cfollowing camino cacid cstructure, cwhat cis cthe cstrongest cintermolecular
cforce cit cwould cparticipate cin cto cstabilize ca cprotein cstructure?
Ionic cbond