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Retired NBME 20 Answers

nbme20/Block 2/Question#3 (reveal difficulty score)
An investigator compares the DNA sequences of ...
5โ€ฒ CCGG ๐Ÿ” / ๐Ÿ“บ / ๐ŸŒณ / ๐Ÿ“–
tags: cell

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 +3  upvote downvote
submitted by โˆ—hayayah(1212)
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toMs terrtonisci zmeysen bndi inalmsrdpo.e

oS ohbt G5'CCG ro CG3'CG dowul haev bene cpacebaelt in hits eoacnri.s

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meningitis  Yse, rteccr.o heT GGC'5C otinpo ocldu scaue eoms o.fcouisnn +1
guillo12  I lryeal t'nod useannddrt the tuniqseo nro het swna.re Cna eosomne niepalx ti ofr mumeisd leki ?me +16
whossayin  yes eapse.l. 'Im whit u21ilolg on hits +
sugaplum  1ll2uiog@ @hoiswasny s qeutoisn ayss 'veuoy reteacd a ewn tuc t,sie . 1 okol ta the gnireo no het csik sv h.yalthe The C ot G si teh ecnhga .2 trieW tuo the icsk G""GCC mrof 3'5-' yuo cudlo itrew tou het wleho ,hgtin tub eth rsewan oyln ahs 4 ret,elts so being azly heer .3 erwti dernu ,ti tsi mcemlnpoe,t het dan esab .rpia So "G"CCG . 4 mrbreeme hobt nratsds are gingo in tpeoipos dnetoicsir when oyu reitw thme otu no top of chae .retoh 5 . oS het ttbomo asdntr cuaaltly adsre 5' GCGC 3' os tath is hte awse rIn eoph taht csaelr ti pu +60
shirafune  oT add ot het nalomdrepi tpr,a ynma eotticrsirn ndlucaeensseo aylutacl fnuctnio as dmise.r achE aulvdiiind uiustnb yuaulsl sha a s,ceakin so ot ceetar a otddber-elsndua rkbea in DNA, thye tmus dbni a inladporme so that caeh eciatzymn nmaido aresect a es-edantgisrnld abrke uhs(t a d-taeuldsrobden rb.eak) +1
alimd  yhW od ew strta mfor CG?GC Why nto GGCG or ?TCAC +6
alimd  Why od ew statr morf ?GGCC hyW otn CGGG ro ?CACT +1
ssbhatti  I kihtn ist deu to eht lpdinmoear iqtr?mueeren +
bbr  bMyea 'Im igisnsm a rpta here, utb hte betastrsu ttah the eenzmy wlli nbdi ot wlli be teh .NDA I ewtn tihw hte neli htat saw omrf hte intsueqso s,emt sa ti si the mtatude NDA lliw eb znocredige yb het tiesorncirt e.emzny I didtn see eth ened ot ncrotev it tnoi sabe n.aprigi tLe me wokn wath ouy ygsu .hkitn +2
uloveboobs  r@bb I .eaegr mI' nletdeiyif otn an rexpte ni tehes bal ,esstt tub eht itneoqsu sska tutrsseb"a cfspiti.eicy" I was ginkthin tath it dlwou ecinogzer het ablomarn ;DAN noignht to od whit RN.A I tid'dn wokn btoau het ipirondlacm enrefecpre of teiosrtirnc sy,zneme utb I 'dtno tiknh 'erehst nya ened to egrufi uto prebniaag-si adn thwntoa eehr. (At asetl rof tihs onieusqt it ddt'in wrok out htta a)wy! +
spaceboy98  luu,apmsg 'Id ivge you an rwdaa if htis swa iedtRd +6



 +2  upvote downvote
submitted by โˆ—topgunber(68)
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eirntRoctis mynseze tcu at mdpnclaiori encq.eu.e.ss i ewnk ihst dolwu beit me ni eht ssa .oadsme+y eW are nsttieg two pecesi of D-AN neo wtih a aotm,nuit oen tw.tuh+oi eW ened ot esu a niscoriertt emnzey ot tuc exyactl hweer teh ttnaimuo si in roerd ot ees hhiwc iecep of NAD hsa teh eeqecsun of sttirnee (eht triortnscie yzeemn ).iste I hecso '5 ,GCCA ihwhc dowlu tcu eth dmteuta arsntd dan ont hte widl pty.e yWh si ihts grwn?o sbceaue nhew oyu ertwi eht lpnrammtyceoe astdnr uyo etg CG,TG wchih is ton a irmorr aeimg fo G.A CC+ Cotrcer arnswe 5' GGCC, the omcatmrlenepy adntsr: G.GCC sThi is a acinldrmipo usneecqe ,)(1 owdul uct teh dtetuma asdntr fo AND nad otn eth ilwd eypt (2,) hcwih nhwe nisug egl rseersopclhtoei het etatudm tnsadr lodwu whos 2 sabdn asllm asbn,d iwleh teh non eumttda datnsr lowdu swoh neo raegl danb 3()

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topgunber  rryos obtu eth faotmr on isht +
utap2001  The nefiinitdo fo ieropnadlm si "rrimro e"qc.neesu heT esvrine of eltcareoympmn atsdrn is het saem htwi nima nrd.ast urtyinssqors:-d-uzo.ii-eadiho-tn/cts-pqoaetc-sy-iewonlhpsremnmtute-cocrsrgsnei///mecatttco +
drdoom  niplnedrmamdraoiplo +



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