辽宁省铁岭市六校2022-2023学年高二下学期期末考试语文试题

辽宁省铁岭市六校2022-2023学年高二下学期期末考试语文试题,以下展示关于辽宁省铁岭市六校2022-2023学年高二下学期期末考试语文试题的相关内容节选，更多内容请多关注我们

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种了组氨酸营养缺陷型菌株且含有少量组氨酸的基本培养基上。经培养后,观察滤纸片周围菌落的生长情况。下列有关说法正确的是A.若含有少量组氨酸的基本培养基上没有产生大菌落,则说明食品样品中可能不含诱变剂A,不含有组氨酸的基本培养基上接种组氨酸营养缺陷型菌株出现少菌落可能是自发突变的结果B.食品样品加入新鲜鼠肝脏匀浆液保温一段时间的目的是诱发肝脏突变产生能够合成组氨酸的相关酶C.若滤纸片周围出现了抑制圈,抑制圈外产生大量菌落,推测食品样品中可能不含有高浓度诱变剂AD.组氨酸营养缺陷型菌株突变为原养型是在食品样品中诱变剂A的作用下相关基因发生回复突变的结果

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