Qhov sib txawv tseem ceeb ntawm ssDNA thiab dsDNA yog tias ssDNA muaj nyob hauv ib txoj kab ntawm deoxyribonucleotides thaum dsDNA tshwm sim raws li ob txoj hlua txuas ntxiv ntawm deoxyribonucleotides txuas ua ke los ntawm hydrogen bonds.
Deoxyribonucleic acid yog ib qho nucleic acid uas ua rau cov khoom siv los ntawm feem ntau ntawm cov kab mob nyob. Nws yog ib qho polymer tsim los ntawm deoxyribonucleotides. Lub nucleotide muaj peb yam: deoxyribose qab zib, nitrogenous puag thiab phosphate pawg. Muaj plaub hom nitrogenous hauv paus xws li adenine (A), guanine (G), cytosine (C), thiab thymine (T). DNA feem ntau tshwm sim raws li ob npaug stranded helix. Tab sis, qee cov kab mob, tshwj xeeb tshaj yog cov kab mob, muaj ib qho DNA stranded.
ssDNA yog dab tsi?
Feem ntau, DNA tshwm sim raws li ob npaug stranded nruj coiled helix. Tab sis qee cov kab mob xws li kab mob muaj ib qho DNA genomes stranded. Ib leeg stranded DNA tsis muaj ob txoj hlua sib txuas ua ke nrog ib leeg. Nws tshwm sim raws li ib txoj hlua ntev ntawm nucleotides.
Daim duab 01: Ib leeg stranded DNA Virus
Tsis tas li ntawd, cov kab mob koom nrog Pawg II ntawm B altimore kev faib tawm xws li cov kab mob ntawm tsev neeg Microviridae muaj ssDNA genomes. Cov kab mob DNA uas nyob ib leeg no muaj ntau nyob rau hauv dej hiav txwv, dej tshiab, sediments, terrestrial thiab huab ib puag ncig, nrog rau metazoan-koom nrog thiab marine microbial lev.
DsDNA yog dab tsi?
dsDNA lossis ob txoj hlua DNA, raws li lub npe txhais tau hais tias, muaj nyob hauv ob txoj hlua. Yog li ntawd, nyob rau hauv dsDNA, muaj ob qho ntxiv ntev strands sib txuas thiab coiled nruj nrog ib leeg. Muaj hydrogen bonds ntawm ob strands. Yog li ntawd, dsDNA yog nruj dua ssDNA. Tsis tas li ntawd, dsDNA ruaj khov dua ssDNA.
Daim duab 02: dsDNA
Ntxiv mus, dsDNA tiv taus cov tshuaj tiv thaiv formaldehyde. Hauv feem ntau cov kab mob muaj sia, dsDNA ua rau genome. Qhov tseem ceeb tshaj plaws, hauv dsDNA, tag nrho cov naj npawb ntawm adenine yog sib npaug rau thymine. Ib yam li ntawd, tag nrho cov cytosine zoo ib yam li guanine.
Dab tsi yog qhov zoo sib xws ntawm ssDNA thiab dsDNA?
- ssDNA thiab dsDNA yog nucleic acids ua los ntawm deoxyribonucleotides.
- Lawv muaj deoxyribose qab zib, nitrogenous hauv paus thiab phosphate pawg.
- Lawv cov tshuaj muaj pes tsawg leeg zoo ib yam.
- Lawv ua raws li cov khoom siv caj ces ntawm cov kab mob nyob.
- Ob leeg yog qhov ua rau puas tsuaj los ntawm cov tshuaj muaj zog thiab UV.
Qhov txawv ntawm ssDNA thiab dsDNA yog dab tsi?
ssDNA tsuas muaj ib txoj hlua ntawm nucleotides thaum dsDNA muaj ob qhov sib ntxiv ntawm nucleotides sib txuas ua ke los ntawm hydrogen bonds. Yog li, qhov no yog qhov sib txawv tseem ceeb ntawm ssDNA thiab dsDNA. Tsis tas li ntawd, ssDNA tsis ruaj khov thiab tawv thaum dsDNA ruaj khov thiab tawv dua. Qhov no yog lwm qhov sib txawv ntawm ssDNA thiab dsDNA. Ntxiv mus, yuav luag tag nrho cov kab mob muaj sia muaj dsDNA thaum tsuas yog ob peb kab mob muaj ssDNA. Qhov no kuj yog qhov sib txawv tseem ceeb ntawm ssDNA thiab dsDNA.
Summary – ssDNA vs dsDNA
ssDNA tsuas muaj ib qho nucleotide strand thaum dsDNA muaj ob lub nucleotide chains uas yog sib ntxiv rau ib leeg thiab khi ua ke los ntawm ob lub hydrogen bonds ntawm adenine thiab thymine, thiab peb hydrogen bonds ntawm cytosine thiab guanine. Yog li, qhov no yog qhov sib txawv tseem ceeb ntawm ssDNA thiab dsDNA. Ntxiv mus, dsDNA yog nruj thiab ruaj khov dua ssDNA. Tsis tas li ntawd, dsDNA muaj nyob rau hauv tag nrho cov kab mob feem ntau thaum ssDNA tsuas muaj nyob rau hauv ob peb hom kab mob. Qhov no qhia txog qhov sib txawv ntawm ssDNA thiab dsDNA.
