题目

如图表示细胞内四种有机物的组成,请依据主要功能分析回答: (1)A是指         ;E在动物肝细胞中是指      ,在植物块茎细胞中主要是指           . (2)F是指        ;除此之外,脂质还包括       和        . (3)C是指        ;若组成蛋白质的氨基酸的平均分子量是130,那么一个由4条肽链共280个氨基酸所组成的蛋白质其分子量是            . (4)D是指      ,它是由一分子       、一分子  12、Due to the fact ________ the people of the town were of the town were given no warning of the coming storm , many people were seriously injured .          A. what                B. that                          C. when                       D. why
生物 试题推荐