DNA quiz answers - assignment PDF

Preview

Summary

assignment...

Description

DNASt r uct ur e 1.Whatar et hepar t sofanucl eot i de? Deoxyr i bosesugar ,ni t r ogenousbase,phosphat ehead. 2.Descr i beorshowhowt hepar t sofanucl eot i dear eputt oget her .

Cov al entbondsat t acht hedi ffer entpar t st oget her . 3.Ther ear et woway sonenucl eot i deconnect st oanot her :descr i beorshow bot h. Cov al entbondi ng–Cov al entbondi ngconnect st hedeoxyr i bosesugarf r om onenucl eot i det ot hephosphat eheadofanot hernucl eot i de. Compl i ment ar ybondi ng-Compl i ment ar ybondi ngi swhent wobasesf r om ar e bondedt oget herwi t hweakhydr ogenbonds. 4.Whatpar tofaDNAnucl eot i dei sf ac i ngout ,andwhatpar tf acesi n? Theni t r ogenousbasegr oupsf acet hei nsi deoft hehel i xandt hesugarand phosphat egr oupsf aceout war d. 5.Wher ear et hest r ongestbondsi naDNAmol ecul el ocat ed,andwher ear et he weak estl ocat ed? Thest r onges tbondsar el ocat edont heout si dewhi chi st hesugarphosphat e backboneandt heweak estbondsar el ocat edwher et hebasesbondt oget her wi t hweak erhydr ogenbonds. 6.Whatar et he4basesi nDNA?

Adeni ne Thymi ne Cyt osi ne Guani ne 7.Whi chbas esconnect / pai rt oget her ? Guani nepai r swi t hCyt osi neandAdeni nepai r swi t hThymi ne. 8.Desc r i beWHYspeci fi cbasespai rt oget her ,andhows hape/ s t r uct ur epl ay sa r ol e. Adeni neandguani nepai rwi t hThymi neandCyt osi nebecaus et heyar e pur i nesandpur i nesar eal way sat t r act edt opyr i mi di nesl i k eThy mi neand Cyt osi ne.Baseswi t ht wor i ngsl i k eGuani neandAdeni nepai rwi t hbaseswi t h 1r i ngl i k eCyt osi neandThymi ne. 9.Desc r i beorshowt het wodi ffer entshapesofbases ,andi dent i f ywhi chbase i swhi chshape.

10. Desc r i beorshowt hes hapeofaDNAmol ec ul e

DNAr epl i c at i on 11. WhydoesDNAr epl i cat e? DNAr epl i cat esbecausewhenev ery ouneedacel l ,y ouneednewDNA. Whenanor gani s m gr ows ,needst oheal ,ormak enewcel l sDNAr epl i cat es. 12. Gi v eanex ampl eofar eal l i f esi t uat i onwher eDNAwoul dneedt or epl i cat e I fy ouf al ldownandcuty our s el f ,y ourbodywi l l mak enewcel l st ohealand y ourDNAwi l lr epl i cat e. 13. Desc r i beorshowt hefi r s ts t epofDNAr epl i c at i on Thefir sts t epi swhenhel i casebr eakst heweakbondsbet weenor i gi nal bases . 14. Desc r i beorshowhowanewst r andi smadef r om at empl at est r and TheDNAbui l di ngenzy mefindscompl ement ar yf r eefloat i ngnucl eot i desand t henconnect st hem t oget heroneatat i met ot heol ds t r andt heni tconnect s t henews ugarphosphat ebackbonewi t ht hecov al entbondsmaki nganew s t r and.

15. Howar ebasesadded:oneatat i me,oral l t oget her ? Basesar eaddedoneatat i me. 16. Whati saf r eefloat i ngnuc l eot i de ? Fr eefloat i ngnucl eot i desar enucl eot i dest hathav eni t r ogenousbasest hatar e notbondedwi t hanyt hi ngy et . 17. Whi chbondsf or m fir st ,asDNAr epl i c at es:t hebondsont hei nsi det he mol ecul eort hebondsont heout si deoft hemol ecul e ? Thehydr ogenbondsf or m fi r standi t sont hei nsi deoft hemol ecul e. 18. Whati st hefinals t epofDNAr epl i cat i on? Thefinals t epwoul dbewhent heDNAdoubl ehel i xr et wi st s . 19. Howmanycompl et eDNAmol ecul esar ecr eat ef r om oneor i gi nal DNA mol ecul e ? 2compl et emol ecul esar ecr eat ed. 20. I nev er ynewl ycr eat edDNAmol ecul e,howmuchoft hemol ec ul ei sbr and new? Half of the chain is part of the original DNA molecule and half is brand new....