转基因食物与非转基因食物的区别是什么?

彩云天天2022-10-04 11:39:541条回答

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一生守侯你 共回答了14个问题 | 采纳率100%
一般来说,
非转基因是自然界就存在的,是自然选择出来的个体;
转基因则是经过了人为的改造,将某些外源基因转入到自然存在的个体,或敲除其某些基因.
从基因型来讲,转基因个体比非转基因个体多了或少了一些基因;
从表现型来讲,转基因个体比非转基因个体多一些人们想要的性状,如高产、抗虫等;
转基因食品是通过遗传工程改变植物种子中的脱氧核糖核酸,然后把这些修改过的再复合基因转移到另一些植物种子内,从而获得在自然界中无法自动生长的植物物种.就是说,通过基因工程手段将一种或几种外源性基因转移至某种生物体(动、植物和微生物等),并使其具有效表达出相应的产物(多肽或蛋白质),这样的生物体作为食品或以其为原料加工生产的食品.
其实,转基因的基本原理也不难了解,它与常规杂交育种有相似之处.
杂交是将整条的基因链(染色体)转移,而基因转移是选取最有用的一小段基因转移.因此,转基因比杂交具有更高的选择性.
为了提高农产品营养价值,更快、更高效地生产食品,科学家们应用转基因的方法,改变生物的遗传信息,拼组新基因,使今后的农作物具有高营养、耐贮藏、抗病虫和抗除草剂的能力,不断生产新的转基因食品.
没有使用基因工程手段自然条件下的物种或加工成的食品可以就是非转基因食品.
转基因食品究竟对人体健康有多大影响,目前没有定论,因为转基因食品通过人体消化吸收后,再通过机体生理反映出来,至少需要200年—500年的时间.转基因食品无法通过肉眼在外观上看出来.建议,在购买食品前一定看清食品的外包装上是否标有“本品含有转基因”,谨慎选择转基因食品.
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这是个敏感的话题.
科学家一般认为没什么危害,而且有严格的验证.目前没发现有一例因转基因食品导致的病例.
民间普遍对未知事物存在疑虑和恐惧,这也可以理解.反对转基因的人士说没有证据表明转基因食物的安全.其实这是一个悖论.就像你说你是不危害人类的,人们可能说你不能保证你以后不会危害人类.
个人观点是,支持进行转基因研究,审慎推广转基因食品.
在日常生活中如何区分转基因食物?
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主要依据是产品包装上的标识,其次就是根据经验来判断,食物的一些外观:个头、颜色、耐储度,成熟时期,等可以粗劣判断.再者就是一些搭载有药用价值的食物.
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楼上错误,并且提供的链接牛头不对马嘴.
黄色圣女果是杂交育种获得的新品种.
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GM food is the food made by transferring genes of different kinds of plants to one plant.
英语翻译正是因为这样没有办法证明转基因食物的危害究竟有多大,所以我们才要反对转基因食物.
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Because that there is no way to prove the harm of genetically modified (gm) food,so we should oppose to genetically modified food.
转基因食物有哪些呢?
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  中国农业部已经批准种植的转基因农作物有:甜椒、西红柿、土豆;主粮作物有玉米、水稻.今后可能陆续批准的农作物有小麦、甘薯、谷子、花生等.进口的转基因食品有大豆油、菜子油、大豆等.目前只有花生油不是转基因的.麦当劳、肯德基的食品基本全部是转基因的.
  中国农业部已经批准种植的转基因农作物有:甜椒、西红柿、土豆;主粮作物有玉米、水稻.今后可能陆续批准的农作物有小麦、甘薯、谷子、花生等.进口的转基因食品有大豆油、菜子油、大豆等.目前只有花生油不是转基因的.麦当劳、肯德基的食品基本全部是转基因的.猪、牛、鸡饲料是转基因玉米、转基因大豆.转基因大豆油是用6号轻汽油浸出的.
  没有承诺不使用转基因成份,或没有回应查询的品牌:
  食用油和调味品:太太乐、辣得劲、迎春楼、四季宝、金象牌、粤皇、味好美牌、美味鲜牌、贵夫人、家乐、老蔡、阿香婆、元宝牌、百味佳牌、老才臣牌、鹰唛、好乐门、红宝牌、福临门、红灯牌、狮头唛、大满贯、鸿禧牌、金龙鱼、花旗、刀唛
  饼干:乐之、趣多多、鬼脸嘟嘟、奥利奥、天伦、美嘉思、丹麦蓝罐曲奇.
  即溶饮品及冲调食品:雀巢、美禄、雀巢巧伴伴、麦斯威尔、果珍、伊利、南方、金味、南国、百草堂、荔八江.
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  婴儿食品及奶粉:雀巢、三鹿、伊利、安怡、安满、亨氏
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  糖果及果冻:雀巢、雀巢奇巧、瑞士糖、喜之郎.
  雪糕:雀巢、五羊、和路雪、伊利
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  黑龙江农垦总局下属的九三油脂本来是坚定的“东北原生大豆油”加工商,近年来为摆脱企业生存危机,被迫在沿海各地也开设了几家工厂专门加工舶来的“转基因大豆油”,这种企业其实最需要消费者支持,拉一下就是坚定战士,推一下就彻底成了叛徒.
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英语作文修改!!急!!report标题solving world hunger by GM food转基因食物,我写评价
英语作文修改!!急!!report标题solving world hunger by GM food转基因食物,我写评价主要写劣势和影响
As a solution to world hunger, genetically modified food do have some advantages as is shown above . However, it also can engender some adverse effects, thus probably raising some controversial problems.
To begin with, the genetically food could cause a great deal of potential health concerns. Firstly, the GM food, which could be toxic or get rise to allergens , are not safe enough. Even scientists could not prove whether they are totally safe. As long as people are allergic with GM food, or be poisoned by them, not only world hunger could not be decreased well, but also more other problems and troubles would emerge. And new toxins or allergens may be moved into initial previous safe foods as a result of engineering food crops. In this situation, the nutritional value of the foods may be decreased. Secondly, once nutrient composition of GM foods change, the structure of people `s nutrition will be likely to lose balance . Thirdly, as British scientific researchers has proved ‘GM DNA could find a way into human gut bacteria’(The guardian,2002), and humans who eat the genetically foods could make people be resistant to antibiotic medicines(Living Earth,1997),which also could lead to many health concerns.
Besides,There is a new analysis of this industry nearly 20-year record in the United States.As is shown from the pie chart, which is about the Contribution of Genetic Engineering to U.S. Corn Yield Increase, genetic engineering only accounts for 14 percent of the increase , their analysis shows that genetic engineering did not increase the yields of crops significant. In the other world , reducing world hunger could not totally count on genetical engineering ,genetically modified crops.
希望得到英语专业人士或者英语成绩优秀者的建议,修改!不甚感激!好的话追加得分!
hope you can revise it and give me some suggestions,I will submit it to blackboard this Friday as a part of group project in manchester unis... Thank you very much!!!
linxin00001年前2
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Solving world hunger by(改为with) GM food
As a solution to world hunger, genetically modified food do have some advantages as is shown above. However, it also can(改为can also) engender some adverse effects, thus probably raising some controversial problems.
To begin with, the genetically(此为副词不可修饰名词,应该加上modified) food could cause a great deal of potential health concerns. Firstly, the GM food, which could be toxic or get (改为give, give rise to固定词组导致)rise to allergens(这是过敏原的意思,如果你想用“过敏”的话是allergies), are(改为is, 因为主语是food) not safe enough. Even scientists could not prove whether they are totally safe. As long as (应改为if, as long as 是只要的意思)people are allergic with(改为to, 固定搭配be allergic to sth) GM food, or be poisoned by them (改为it因为指代food), not only world hunger could not be decreased well(整个句子要改一改,not only 置于句首要倒装,not only could not world hunger be reduced), but also more other problems and troubles would emerge. And new toxins or allergens may be moved into(转移到,用move into就可以了,不需要被动) initial previous safe foods(想表达的应该是“以前安全的食物”吧,应改为previously safe food) as a result of engineering food crops. In this situation, the nutritional value of the foods(统称食物时food 是不可数应该去掉‘s’) may be decreased(decrease一般主动表减少,改为may decrease). Secondly, once nutrient composition of GM foods change, the structure of people `s nutrition will be likely to lose balance . Thirdly, as(去掉as) British scientific researchers has proved ‘GM DNA could find a way into human gut bacteria’(The guardian,2002), and humans who eat the genetically(加上modified) foods(用food) could make people be(去掉be) resistant to antibiotic medicines(Living Earth,1997),which also could lead to many health concerns.
Besides,There (改为besides, there)is a new analysis of this industry nearly 20-year record in the United States(句子有问题,不知想表达何意?). As is shown from the pie chart, which is about the Contribution of Genetic Engineering to U.S. Corn Yield Increase, genetic engineering only accounts for 14 percent of the increase , their analysis shows that genetic engineering did not increase the yields of crops significant(句子改为As the pie chart about the Contribution of Genetic Engineering to U.S. Corn Yield Increase shows, genetic engineering only accounts for 14 percent of the increase ,that is, genetic engineering did not increase the yields of crops significantly). In the other world (换句话说是in other words), reducing world hunger could not totally count on genetical engineering ,(加上or)genetically modified crops.
关于食物dna不能完全降解吃转基因食物会有残留,那为什么我们平常吃的正常食物的DNA不能进入人体?按道理是可以的吧?
大内密探3571年前2
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按理说,吃进的DNA都会被降解

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