Vim li cas pyrimidine tsuas yog khi nrog purine?
Vim li cas pyrimidine tsuas yog khi nrog purine?

Video: Vim li cas pyrimidine tsuas yog khi nrog purine?

Video: Vim li cas pyrimidine tsuas yog khi nrog purine?
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Teb thiab piav qhia: Purines khub nrog pyrimidines ua vim hais tias lawv ob leeg muaj nitrogenous bases uas txhais tau hais tias ob qho tib si molecules muaj complementary qauv uas tsim

Ib yam li ntawd, vim li cas purines sib cog lus nrog pyrimidines?

Cov nucleotides no yog complementary - lawv cov duab tso cai rau lawv daim ntawv cog lus ua ke nrog hydrogen daim ntawv cog lus . Hauv C-G khub, tus tshuaj purine (guanine) muaj peb qhov chaw sib khi, thiab lwm yam ua tus pyrimidine (cytosine). Cov hydrogen kev sib raug zoo nruab nrab ntawm lub hauv paus ntxiv yog dab tsi tuav ob kab DNA ua ke.

Ib yam li ntawd, hom ntawv cog lus twg ua purines thiab pyrimidines? Purines ib txwm daim ntawv cog lus nrog pyrimidines ua ntawm hydrogen daim ntawv cog lus ua raws li txoj cai Chargaff hauv dsDNA, tshwj xeeb tshaj yog txhua tus daim ntawv cog lus ua raws li Watson-Crick hauv paus kev sib koom ua ke. Yog li ntawd, adenine tshwj xeeb daim ntawv cog lus rau thymine tsim ob hydrogen daim ntawv cog lus , yog guanine daim ntawv peb hydrogen daim ntawv cog lus Nrog Cytosine.

Kuj tseem paub yog, puas yog purines nkaus xwb nrog pyrimidines?

Cov qauv molecular ntawm ob qho tib si pyrimidines ua thiab cov purines tso cai rau lawv nkaus xwb muaj peev xwm daim ntawv cog lus nrog ib leeg thiab tsis nyob hauv pab pawg. Thymine ( pyrimidine thiab adenine ( tshuaj purine ) ob leeg muaj ob lub atom uas ua tau los yog muab H daim ntawv cog lus los yog txais nws. Cytosine (pyr.) thiab guanine (pur.)

Vim li cas nws thiaj li muaj txiaj ntsig zoo rau lub hauv paus khub ntawm DNA kom tuav ua ke los ntawm hydrogen bonds thiab tsis covalent bonds?

Complementary base kev sib tw yog qhov tseem ceeb vim qhov hydrogen bonds nruab nrab ntawm hauv paus tuav ob txoj hlua ntawm DNA ua ke thiab vim nws yog ib txoj hauv kev rau DNA rov ua dua.

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