Medicine es in lots of different packages. Painkillers in a tablet can make your headache go away. Antibiotic cream (抗菌素膏) from a tube can prevent your cuts from being infected. But can medicine e packaged in chicken eggs?
A team of scientists from Scotland say “yes”. They’ve engineered special chickens that lay eggs with disease-treating drugs inside.
These eggs e from chickens that have been engineered to produce certain drugs inside their egg whites.
These drugs are made of molecules called proteins(蛋白质). Animals make thousands of proteins — they’re the main element in skin, hair, milk and meat. Since animals can make proteins easily, they’re good candidates (候选者) for making protein drugs.
Researchers have already made cows, sheep and goats produce protein drugs in their milk. But chickens are cheaper to take care of, need less room, and grow faster than these other animals. Those qualities could make chickens a better choice to bee living drug factories, says Simon Lillico of the Roslin Institute near Edinburgh, Scotland.
Lillico and a team of researchers changed chickens’ DNA — the code that tells cells how to make proteins — so that the birds’ cells made two protein drugs. One drug can treat skin cancer, and the other treats a nerve disease called multiple sclerosis (多发性硬化).
The scientists changed the chickens’ DNA so that the birds made these drugs only in their egg whites. This protects the chickens’ bodies from the drugs’ possible harmful effects and makes it easy for scientists to collect the drugs.
【小题1】If you cut your finger, you may use to cure it.A．painkillers in a tabletB．antibiotic cream from a tube C．chicken eggs D．protein drugs【小题2】Which of the following statements is NOT true?A．Scientists from Scotland have succeeded in packing medicine into chicken eggs.B．The drugs are made of molecules called proteins.C．Scientists chose chickens for their experiments because chicken eggs taste delicious.D．The animals are good candidates for making protein drugs.【小题3】The drugs in special chicken eggs can .A．treat lung cancer B．help reduce headacheC．change people’s DNA D．treat multiple sclerosis【小题4】We can infer from the passage that .A．eating eggs is the best choice for the patients nowB．scientists changed the chicken’s DNA and put all the drugs in chicken eggsC．we may eat special eggs as drugs when we are sick in the futureD．the drugs produce harmful effects on the chicken’s bodies【小题5】The best title for the passage is .A．Chicken Eggs to Replace MedicineB．Chicken Eggs as DrugC．Chicken Eggs and MedicineD．Chicken Eggs and Animal MilkB
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(答案→)B
解析：本文叙述了科学家可以对于鸡蛋的蛋白进行DNA改变而制成一种能治疗多发性硬化和皮肤癌的病，文中给出了为什么选用鸡的蛋白，主要因为鸡很容易喂养，占用空间小，生长快的特点。
【小题1】细节理解题。根据Antibiotic cream (抗菌素膏) from a tube can prevent your cuts from being infected. 砍伤用抗抗菌素膏防止发炎，故选B。
【小题2】细节理解题。根据chickens are cheaper to take care of, need less room, and grow faster than these other animals.并不是因为鸡肉尝起来好吃，故选C。
【小题3】细节理解题。根据The scientists changed the chickens’ DNA so that the birds made these drugs only in their egg whites. 鸡蛋的蛋白进行了DNA改变能够制造这种药治疗多发性硬化，故选D。
【小题4】推理判断题。根据This protects the chickens’ bodies from the drugs’ possible harmful effects 可能在未来会给人们带来伤害，故选C。
【小题5】标题归纳题。纵观全文可知本文主要叙述了人们吃的蛋白与用它做成的药，故选B。