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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 dredsbiec ni hte oinetqsu set,m tshi ontmuita uccsor nwhiti an ntrino (a ngee tengsem hhwic is ecartbsinrd AR;]tNDgN[-&A ubt ton t.aert)sdlan NRA nicipgsl enze)ys(m rbag ARN adn olo“p i;”t na irnont is uct uto adn hte eosnx on iehetr eisd of eht norint rea dinojdae, liek ish:t

o—en2rtnoixo1en—nx ;tg&= 2xno—eenxo1

,aiycTllpy shti gsiilnpc cuocsr ta the evyr eegsd fo het nntrio wt(ah I eoneddt hiwt eht —”“ ahatcr.re)c But ni ruo a,sce a nmtiatou wtiinh eht nrnoti is gicsanu NRA ilscping emnyez ot nereczgoi a wne s:iet the icerlps tscu hiiwtn the tionrn (ietsand fo ta teh ryev de,ge as ti )usdl.ho So, we teg hmesitngo ttah oloks ikle hsti:

nxno—onr2—xee1ti

atT’sh a tllayot tnfefeird ARNm ,cullemoe and 'tis giong ot mkae our bgβil-on ieopnrt oklo a(dn )heevba yflwalu a.tesrgn

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drdanielr  I rebeemrm tath ni eth Ap-ReNr,m eht pligcnis steis fo hte ronitn eewhr eht ciosmlseoep ecahstat are nesudrdour by "-GG"UA-- leki ua","gc so rhee the oluohomosg DNA to tsih dsrtna ldowu be drecnatbsir iont ."u..g....g"..........a. adn ihst oduwl reaetc a 3' lcsei esit oto noos +7
vivarin  if htis is psdsuepo ot be e,r-ANmRp ywh are eterh sT' in het u?ceeqnse m'I so decnufso yb htis rfo mseo aoners +8
sars  shiT si eth egen ,A(DN) ont ngeruehsoote NAR.m +
athenathefirst  ehT tiesbgg lcue hyte sdai stih si B h,ailteasasm whhci nvee if uyo tdid'n wnko haigytnn uatbo esxon dan ionstnr oyu oldshu ahev nonwk atht b leatsmsahai ilnvvseo a oamntitu in silipgcn or erotopmr tsei ah(omtap pgae 44). I tog thsi oietsnuq wogrn oto :( +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


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 +5  upvote downvote
submitted by monoloco(155)
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hsTi hsa to od hwit tniron ncsii.plg beermRme G.GTA ihTs namuitto didenuc na AG ceolrs ewerh it swa osupspde ot ,eb so omes fo htat rnnoti juts ebecma na n.xoe

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 +4  upvote downvote
submitted by waterloo(126)
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I enetiprrdte cu"neseeq orununsirdg rstfi otw nexso fo "nege - to nmae hyte smut eb gktianl bouat s.otrnni rheTe fo teh rswnae csichoe d'not eahv hmcu ot od twih tosr.inn

  • senmesis oaiuttnm uodwl veha ot be in the oenx ot auces hgncae in nimao ad.ic
  • lnetdoynpoaaiyl is at hte nde fo eth RNAm
  • hibtnioiin fo tniiroecpal si NAD

thta aym tno be ari t,ghti tbu hlesp wrrnoa .ownd slAo kiwngno eosm hmsisaB-eatal si deu to vniasart in aoblnarm inpigslc el.sph F(A 9021 pg 4)3

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 +1  upvote downvote
submitted by s1khwitit(1)
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soal remrebme that simatBaehsl-a si deu ot otinp nutasimto ni isepcl isste nda eorropmt eusseqenc FA(91 .gp401) If ouy eratec a utimoant ni a piecls tise you liwl uslery smes up teh certroc RmNA needed ot kema a cufinaonlt bBn-iolg neiropt. taTh is how I warednes het u.eiqnost

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