Deoxyribose yog ib qho monosaccharide uas ua lub luag haujlwm tseem ceeb hauv kev lom neeg

2024 Tus sau: Angel Austin | [email protected]. Kawg hloov kho: 2023-12-17 05:28

Deoxyribose yog 5-carbon monosaccharide (pentose) uas yog tsim los ntawm ribose thaum nws poob ib qho oxygen atom. Cov tshuaj empirical rau deoxyribose yog C₅H₁₀O₄, thiab vim poob ntawm ib qho oxygen atom, nws tsis pom zoo nrog cov qauv dav dav rau monosaccharides (CH₂O) , qhov twg n yog tus lej.

Lub cev thiab tshuaj lom neeg

Cov qauv qhia tawm rau deoxyribose tuaj yeem sawv cev raws li hauv qab no: H-(C=O)–(CH2)–(CHOH)₃-H. Txawm li cas los xij, nws kuj muaj nyob rau hauv daim ntawv ntawm lub nplhaib kaw ntawm carbon atoms.

Deoxyribose yog cov khoom tsis muaj xim uas tsis muaj ntxhiab thiab soluble hauv dej. Nws qhov hnyav molecular yog 134.13 g / mol, melting point 91 ° C. Nws tau txais los ntawm ribose-5-phosphate vim qhov kev ua ntawm cov enzymes tsim nyog thaum txo cov tshuaj tiv thaiv.

Qhov txawv ntawm ribose thiab deoxyribose

Raws li tau hais thiab raws li lub npe qhia, deoxyribose yog cov tshuaj lom neeg uas nws cov atomic muaj pes tsawg leeg sib txawv ntawm ribose los ntawm ib qho oxygen atom. Raws li qhiaHauv daim duab hauv qab no, deoxyribose tsis muaj OH hydroxyl pawg ntawm nws cov pa roj carbon thib ob.

Deoxyribose yog ib feem ntawm DNA (deoxyribonucleic acid) saw, hos ribose yog ib feem ntawm RNA (ribonucleic acid) saw.

Nws yog qhov nthuav kom nco ntsoov tias cov monosaccharides arabinose thiab ribose yog stereoisomers, uas yog, lawv txawv ntawm qhov sib txawv ntawm qhov sib txawv ntawm lub dav hlau ntawm OH pawg nplhaib ze ntawm 2nd carbon atom. Deoxyarabinose thiab deoxyribose yog tib lub ntsiab lus, tab sis lub npe thib ob yog siv vim tias cov molecule no tau los ntawm ribose.

Deoxyribose thiab genetic information

Vim tias deoxyribose yog ib feem ntawm DNA saw, nws ua lub luag haujlwm tseem ceeb hauv kev lom neeg. DNA - qhov chaw ntawm cov ntaub ntawv keeb kwm, muaj nucleotides, uas suav nrog deoxyribose. Deoxyribose molecules txuas ib nucleotide mus rau lwm qhov hauv DNA saw los ntawm phosphate pawg.

Qhov tsis muaj ntawm pawg hydroxyl OH hauv deoxyribose tau pom tias muab cov tshuab hloov pauv mus rau tag nrho DNA saw piv rau RNA, uas ua rau cov DNA molecule tsim ob txoj hlua thiab nyob rau hauv daim ntawv compact hauv lub cell nucleus.

Ntxiv rau, vim qhov hloov pauv ntawm kev sib txuas ntawm nucleotides tsim los ntawm deoxyribose molecules thiab phosphate pawg, DNA saw ntev ntev dua RNA. Qhov tseeb no ua rau nws muaj peev xwm encode cov ntaub ntawv caj ces nrog qhov ntom ntom.