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type="text/javascript">s("title_top");</script> <h1 class="title">碳鏈?zhǔn)鞘裁吹幕竟羌?/h1> <script type="text/javascript">s("content_top");</script> <div id="fh3peh5a" class="answer"><span>回答</span><em></em></div> <div id="fh3peh5a" class="answer_t"> <i class="answer_icon"></i> <span>瑞文問(wèn)答</span> <p>2024-08-27</span> </div> <div id="fh3peh5a" class="explain"> 碳鏈?zhǔn)巧锎蠓肿拥幕竟羌�。生物大分子以碳鏈為骨架，每一個(gè)單體都以若個(gè)相連的碳原子構(gòu)成的碳鏈為基本骨架.由許多單體連接成多聚體。生物大分子是指生物體細(xì)胞內(nèi)存在的蛋白質(zhì)、核酸、多糖等大分子。 </div> <div id="fh3peh5a" class="content-title"><i></i><h2>擴(kuò)展資料</h2></div> <div id="fh3peh5a" class="content"><p>　　生物大分子與低相對(duì)分子量的生物有機(jī)化合物相比，高相對(duì)分子量的有機(jī)化合物具有更高級(jí)的物質(zhì)群。它們是由低相對(duì)分子量的有機(jī)化合物經(jīng)過(guò)聚合而成的多分子體系。生物大分子大多數(shù)是由簡(jiǎn)單的組成結(jié)構(gòu)聚合而成的，蛋白質(zhì)的組成單位是氨基酸，核酸的組成單位是核苷酸……像氨基酸、脂肪酸等都叫做生物單分子，是與生命有著密切關(guān)系的物質(zhì)，它們是構(gòu)成大分子的基本物質(zhì)。從化學(xué)結(jié)構(gòu)而言，蛋白質(zhì)是由α-L-氨基酸脫水縮合而成的，核酸是由嘌呤和嘧啶堿基，與糖D-核糖或2-脫氧-D-核糖、磷酸脫水縮合而成，多糖是由單糖脫水縮合而成。</p></div> <script 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