問題詳情

第 37 題至 40 題為篇章結構，各題請依文意，從四個選項中選出最合適者，各題答案內容不重複   The field of molecular genetics is moving at a rapid pace. Our ability to manipulate genes and understand thecomplex processes involved in genetics is developing almost on a daily basis. 37 In particular, gene therapy is oneaspect of molecular genetics that is causing a lot of concern.   Gene therapy is defined as a way of curing or preventing disease by changing the behavior of a person’s genes.Currently, gene therapy is still in its early stage, with most of it still experimental. There are actually two types of genetherapy: somatic and germline. Somatic gene therapy targets genes in the soma, or body, cells. 38 For example,experimental trials in treating cystic fibrosis treat the genes only in the cells of the lungs and, consequently, thepatient’s children would still be at risk for the disease. 39 The egg or sperm cells of the patient are genetically changed with the goal of passing on these changes totheir children. In practice, this would mean changing the fertilized egg, the embryo-to-be, so that the genetic changeswould be copied into every cell of the future adult, including the reproductive cells. In fact, germline geneticengineering is not being actively investigated in humans or even large animals at this point. Thus far, the proceduresare still too dangerous and undeveloped. Experimentation has occurred with mice where genes are added or deletedand the effects observed to help better understand gene functions. 40 But, in fact, these reports are either of somatic gene therapy trials or of cloning, which in itself does notalter any genes, but merely copies them. Furthermore, even in the field of somatic gene therapy, many factors haveprevented researchers from developing successful gene therapy techniques.
37
(A) Scientists have tried to replace disease-causing genes with healthy ones.
(B) In this way, the genome of the recipient is changed, but this change is not passed onto the next generation.
(C) Understandably, people have fears about this powerful technology and are worried that we may use it in ways to change our humanity.
(D) Many people falsely assume that germline genetic engineering is already performed with regularity, due to news reports of genetic manipulation.

參考答案

答案：C
難度：非常困難0
統計：A(0),B(2),C(0),D(0),E(0)

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