建成 asked in 科學其他:科學 · 1 decade ago

請問 核苷酸 再生物體內有哪些功能~~急問

核苷酸除了核酸的組成之外.還有哪些功能??

請問 核苷酸 再生物體內有哪些功能~~急問

3 Answers

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  • Tiger
    Lv 5
    1 decade ago
    Favorite Answer

    As a class, the nucleotides or nucleic acids may be considered one of the most important metabolites of the cell. Nucleotides are found primarily as the monomeric units comprising the major nucleic acids of the cell, RNA and DNA. However, they also are required for numerous other important functions within the cell. These functions include: 1. serving as energy stores for future use in phosphate transfer reactions. These reactions are predominantly carried out by ATP. 2. forming a portion of several important coenzymes such as NAD+, NADP+, FAD and coenzyme A. 3. serving as mediators of numerous important cellular processes such as second messengers in signal transduction events. The predominant second messenger is cyclic-AMP (cAMP), a cyclic derivative of AMP formed from ATP. ATP (adenosine triphosphate) is a nucleotide that is used in energetic reactions for temporary energy storage.Energy is stored in the phosphate bonds of ATP. When the bonds are broken, the energy is released. Normally, cells use the energy stored in ATP by breaking one of the phosphate bonds, producing ADP. Energy is required to convert ADP + Pi back to ATP.

    圖片參考:http://faculty.clintoncc.suny.edu/faculty/Michael....

    4. controlling numerous enzymatic reactions through allosteric effects on enzyme activity. 5. serving as activated intermediates in numerous biosynthetic reactions. These activated intermediates include S-adenosylmethionine (S-AdoMet) involved in methyl transfer reactions as well as the many sugar coupled nucleotides involved in glycogen and glycoprotein synthesis.

    Source(s): from Tiger & google.com
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  • Anonymous
    6 years ago

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  • 1 decade ago

    核甘酸(Nucleotides)普遍存在生物體中,是構成遺傳物質DNA及RNA的基本單位,參與DNA複製以進行細胞分裂、增生組織及生物體的生長,並廣泛參與生物體內生化代謝的進行。

    美國小兒科醫學會(AAP)表示,核甘酸與免疫能力的增加、腸胃道系統的發育、與減少腸內致病菌叢的繁衍有關,但有關核甘酸對人體的潛在功能,還需要更進一步的研究來證實。

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