下列有关生物体内化合物的叙述,正确的是                

下列有关生物体内化合物的叙述,正确的是                 

A.纤维素是植物细胞壁的主要成分,其基本组成单位是葡萄糖

B.动物细胞间的物质主要是蛋白质,可用胃蛋白酶处理动物组织

CRNA只分布在真核细胞的细胞质中,其组成元素有CHONP

D.磷脂是线粒体、中心体和叶绿体等结构的生物膜的主要成分

答案

A

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