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Retired NBME 20 Answers

nbme20/Block 1/Question#11 (reveal difficulty score)
The sequence surrounding the first two exons ...
Disruption of normal splicing by creation of a new 3′ splice site 🔍 / 📺 / 🌳 / 📖
tags: biochem dna repeat

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 +20  upvote downvote
submitted by drdoom(1206)
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As ebdcesrdi in het tsioequn ,tmse tihs itnoatum srocuc ihwitn an rtinno (a nege smenegt chhwi si etrrabcsdni A&AN]tg;-D[RN tub nto l.ntsedr)ata RAN cpsgiiln mn(e)szey grba ARN dna loop“ i”t; na onrtin si utc tou dan the seoxn on teierh dsie fo het irnnto rae edjnoia,d leki shit:

nnx—2xn1oornet—eoi => 1neoxne—2xo

aipTlyl,yc shit cglnpisi cscoru at het rvye dgese of het tnrino w(hat I odendet whti het —“” .hcrte)rcaa tuB in our ,sace a moatiunt hniwit teh rninot is agnicsu RNA pisnlgci eynzem ot erzgcinoe a wen i:set teh lcipesr ucts intwhi teh onintr id(setna fo ta eht ryev eg,de as it dso).luh ,So we egt tniogsemh atht skloo klei hsti:

xtr—xeneono12—ni

asth’T a lalotyt etfidrfen mARN oceume,ll adn 'tis ggion to aemk oru blo-nβgi eonptri ookl a(nd )ehevab lyalfwu rnst.gae

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drdanielr  I eremmbre ahtt in hte NeRrA-p,m teh ilgncips isset of eht ritnon wereh the losepcemiso tahseatc era uoudsrernd yb UG-G-""-A iekl c"au"g, so ereh teh ogohsuloom NAD ot this ntsdra odwlu be tnecrbarids onit .au............g".g...". adn this udwol taerce a '3 selci iets oot osno +7
vivarin  if isht is euopsdps to eb Npem-ARr, hyw are teerh sT' ni het ?nueqeesc Im' os ecunsofd by htsi rof moes sreaon +8
sars  Tish is the egne N(,A)D ton uneeethrogso ARm.N +
athenathefirst  The ggbiest ecul yhte dsia siht si B eaai,lhmatss hiwhc enev fi oyu d'ndti wnok atnginyh btuoa eoxsn dna notrins uyo udhols vhae nwonk atth b lsaethaamsi vviolsen a ttaonmui in cniiplsg ro toorrmep eist thmoapa( apge 44). I got hsti esiunoqt nwgro too (: +1

Translocation may result in failure to transcribe RNA because of disruption of a regulatory element (eg, promoter) within a gene.

The affected gene will not be expressed or will be expressed in a dysregulated manner compared to the normal phenotype



 +5  upvote downvote
submitted by monoloco(155)
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Tish sah ot od whti nntroi gs.clpiin reRmebme .GGTA hTis aminoutt duncied na GA escrol eewrh ti aws psdeupso ot eb, so seom fo thta rtnnoi jtus ebmaec na no.ex

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 +4  upvote downvote
submitted by waterloo(126)
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I etdtireenpr eq"scunee rgsurunidon srift otw nxoes fo n"eeg - to maen yhte usmt eb klgatin boatu itnrn.os eherT of het wsrean hccoies dton' vhae uchm to do hwti .iortsnn

  • nsssmeie tiunaotm dulow vhea ot be in het xeon to sucea egahcn ni nomia idc.a
  • oydnlyiatlapeon is at hte edn fo the NmRA
  • iithiinbon fo elinrcpiato is DAN

ahtt mya otn eb air tg,hti ubt eplsh rorawn o.wdn oAsl nowknig moes shiBa-smltaea si deu ot nvarasti in namloarb iplgiscn lpes.h F(A 0129 pg 4)3

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 +1  upvote downvote
submitted by s1khwitit(1)
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oals eerrmbme hatt ai-hBlsmesata is eud to ntiop tmsauotin in ieclsp essit dan rotoremp eqcsunees F1(A9 p).g410 fI uoy create a outinmat in a ieplsc stie yuo ilwl ruyels emss pu eth roetccr ARmN eddeen ot make a uafnilntoc gbion-Bl oteprn.i htaT is how I ewdnsera eht uniqte.os

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