The biological functions of nucleotides in vivo include (  )A:As cytoskeleton B:Raw materials for nucleic acid synthesis in vivo C:Some nucleotides can be used as second messengers of hormones D:Some nucleotides are allosteric effectors of allosteric enzymes E:Some nucleotides are the direct energy suppliers in the organism 答案: Raw materials for nucleic acid synthesis in vivo;Some nucleotides can be used as second messengers of hormones;Some nucleotides are allosteric effectors of allosteric enzymes;Some nucleotides are the direct energy suppliers in the organism第三章 单元测试