19.5. Nucleic acids yog cov loj heev biomolecules ua los ntawm monomers hu ua nucleotides. Nucleotides muaj peb yam: pentose qab zib (5-carbon qab zib), phosphate pawg, thiab nitrogenous puag.
Nucleotide cov ntsiab lus yog dab tsi?
Nucleotide
A nucleotide muaj qab zib molecule (xws li ribose hauv RNA lossis deoxyribose hauv DNA) txuas rau pawg phosphate thiab cov hauv paus muaj nitrogen Cov hauv paus siv DNA yog adenine (A), cytosine (C), guanine (G), thiab thymine (T). Hauv RNA, lub hauv paus uracil (U) siv qhov chaw ntawm thymine.
Qhov twg tsis yog cov ntsiab lus ntawm nucleic acid?
Guanine yog lub hauv paus nitrogenous, uas yog ib qho tseem ceeb ntawm nucleic acid thiab tsis guanidine.
Dab tsi yog 3 lub luag haujlwm tseem ceeb ntawm nucleic acids?
Nucleic acids ua haujlwm tsim, encode, thiab khaws cov ntaub ntawv lom neeg hauv hlwb, thiab ua haujlwm xa tawm thiab nthuav tawm cov ntaub ntawv ntawd sab hauv thiab sab nraud nucleus.
tsib feem ntawm nucleic acids yog dab tsi?
Muaj tsib qhov yooj yim ntawm nucleic acids. Tag nrho cov nucleic acids yog tsim los ntawm tib lub tsev thaiv (monomers). Chemists hu cov monomers "nucleotides." Tsib daim yog uracil, cytosine, thymine, adenine, thiab guanineTxawm koj nyob hauv chav kawm txuj ci twg, koj yuav hnov txog ATCG thaum saib DNA.
