首页
登录
职称英语
Many experts who favor genetically modified foods believe that genetic engineeri
Many experts who favor genetically modified foods believe that genetic engineeri
游客
2024-06-18
4
管理
问题
Many experts who favor genetically modified foods believe that genetic engineering can help to meet the demands of the world’s increasing population. [br] The plants would be insect resistant as a gene from the soil bacterium could direct cells to produce ______ that is toxic to certain insects.
选项
答案
a crystalline protein
解析
农作物植入抗虫害基因可以对一些害虫产生“免疫”,这里面的作用机理在文章里有表述"To date, insect resistance has been provided by a gene from the soil bacterium Bacillus thuringiensis(Bt). This gene directs cells to manufacture a crystalline protein that is toxic to certain insects—especially caterpillars and beetles that gnaw on crops—but does not harm other organisms"——作物植入抗虫基因,也产生了优劣参半的后果。目前,抗虫害的特性是取自土壤中杆菌苏力菌(Bacillus thuringiensis,下文简称Bt)的—个基因。这个基因会促使细胞制造—种晶体状蛋白质,对某些昆虫来说是毒药,尤其是啃食作物的毛毛虫和甲虫,却不会伤害其他生物;而且不同的苏力菌菌株,各有不同的毒基因,影响的昆虫也不同。
转载请注明原文地址:https://tihaiku.com/zcyy/3639273.html
相关试题推荐
Weallbelievethatitishardforhimtotakeupother(responsible)________n
Thefirstparagraphdescribesindetail___________.[br]Theauthorbelievesth
Teachersbelievethatstudents’responsibilitywithS1.______
Manyexpertswhofavorgeneticallymodifiedfoodsbelievethatgeneticengineeri
Manyexpertswhofavorgeneticallymodifiedfoodsbelievethatgeneticengineeri
Manyexpertswhofavorgeneticallymodifiedfoodsbelievethatgeneticengineeri
Manyexpertswhofavorgeneticallymodifiedfoodsbelievethatgeneticengineeri
Manyexpertswhofavorgeneticallymodifiedfoodsbelievethatgeneticengineeri
Manyteachersbelievethattheresponsibilityforlearninglieswiththestu
Manyteachersbelievethattheresponsibilityforlearninglieswiththestu
随机试题
Itisdifficultforhertomakethefinaldecisionnow,_____sheisinadelica
AscivilwarseruptedthroughouttheRomanRepublicinthe1stcenturyB.C.,
[originaltext]M:Honey,thebasketballgameisabouttostart.Andcouldyoubr
19世纪末,日本在中国划分的"势力范围"是( )A.山东 B.长城以北
以下关于加密算法的叙述中,正确的是()。 A.DES算法采用128位的
我国学前教育在亚太地区属于比较好的,20世纪末统计3~6岁幼儿入园率约为( )
FrontPage2003中的框架是网页布局设计的重要手段,框架将浏览器窗口划
(2015年真题)关于追诉时效,下列哪些选项是正确的?A.甲犯劫持航空器罪,即便
国内信用证结算既可以用于转账结算,也可以支取现金。()
当大体积混凝土施工设置水平施工缝时,位置及间歇时间应根据()等因素确定。A.设
最新回复
(
0
)