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【简答题】

Sugar—free beets(甜菜)that still taste sweet, tastier tomatoes and brighter-colored fruits and vegetables that stay ripe(熟的)longer are all foods that are being grown now. How can they
carry traits, such as being tastier, brighter, and riper? They are genetically engineered.
Genetic engineering(基因工程)is like a change in a recipe. For example, when you make cakes, you mix together all of the usual ingredients. If you add an extra ingredient, like salt, the cakes will taste differently.
Genes are ingredients in the recipe for life. They carry the traits of living things. Your genes dictate what color hair and eyes you’ll have, how tall you’ll be, as well as many other traits. Genes carry traits for plants, too. By adding genes to a plant, you can sometimes create new traits. For example, adding a certain gene to a potato plant can make the potato plant distasteful to bugs(虫子). This makes some farmers happy because they don’t have to use chemicals to keep bugs away from their plants.
It sounds great, but some people are opposed to the idea of food that is genetically engineered. Ronnie Cummins, from the Campaign for Food Safety, is against it. He says that one of the major concerns is allergies(过敏). Supermarkets don’t always label foods that are genetically engineered. A customer could unknowingly buy food that has an added gene from another plant that he or she is allergic to. It could be erous.
Gary Burton from Monsanto, a seed(种子)company that engineers food, disagrees. He says his company tests for allergies. Burton believes that genetic engineering is a valuable tool for better food. The technology can help farmers use less insecticide(杀虫剂)and grow healthier crops. Burton thinks there are many advantages.
But Cummins says that we just don’t know what will happen in the future if we keep adding genes to foods. We could mistakenly create a monster.
People have different opinions about genetic engineering. One side supports it and thinks it will only help us. The other side is opposed to playing with nature and fears health risks. Which side do you think is right?
小题1:What could be a good thing about food that is genetically engineered?A.It’s more expensive.B.It could taste different.C.It requires less insecticide.D.It’s not labeled in the supermarket.小题2:In general, who does not support the idea of genetic food?A.People from seed companies.B.Farmers who use engineered seeds.C.People from the Campaign for Food Safety.D.Scientists who create genetically engineered food.小题3:It can be inferred that.A.growing genetic foods will make farmers richerB.people will eat more genetic foods in the futureC.using fewer chemicals could make the food tastierD.there could be unknown ers about genetic foods小题4:What is the best title of this passage?A.Future FarmingB.Genetic EngineeringC.Foods with a DifferenceD.Genetically Engineered Fruits

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【单选题】下列不可能作为基因工程受体细胞的是( )

A.
动物的受精卵细胞
B.
人的神经细胞
C.
大肠杆菌细胞
D.
酵母菌细胞

【单选题】Many Americans harbor a grossly distorted and exaggerated view of most of the risks surrounding food.Fergus Clydesdale, head of the department of food science and nutrition at the University of Massac...

A.
They overlook the risks of the food they eat.
B.
They overestimate the hazards of their food.
C.
They are overoptimistic about the safety of their food.
D.
They overstate the government's interference with the food industry.

【单选题】基因工程是 DNA 分子水平的操作,下列有关基因工程的叙述中,错误的是 ___ ___ 。

A.
限制酶只用于切割获取目的基因
B.
载体与目的基因必须用同一种限制酶处理
C.
基因工程所用的工具酶有限制酶, DNA 连接酶等
D.
带有目的基因的载体是否进入受体细胞需检测