問題詳情

Qs 11-20 閱讀測驗: 請根據題意，選擇一個最適當的答案。     DNA is a powerful investigative tool because no two people have the same DNA. The onlyexception scientists have found to this is identical twins. The sequence, or order, of the DNA buildingblocks is different in particular regions of the cell, making each person’s DNA unique. Because of this,DNA evidence collected at the scene of a crime can link a suspect to the crime or can eliminate someonefrom suspicion. DNA is similar to fingerprints, but has been considered more accurate for the pastdecade. DNA can also link evidence to a victim by using DNA of relatives if the victim’s body cannotbe found. For example, if technicians have a biological sample from the victim, such as a bloodstainfound at the crime scene, the DNA taken from that bloodstain can be compared with DNA from thevictim’s biological relatives to determine whether the bloodstain came from that particular victim. Whena DNA profile developed from evidence at one crime scene is compared with a DNA profile developedfrom evidence found at another crime scene, the crimes can be linked to each other or to the samesuspect, making it possible to link crimes committed at a distance from one another.     Although many forensic scientists had begun to think of DNA as a miracle identifier, in 2009,scientists for the first time found that it was possible to fabricate DNA evidence from a person otherthan the donor of the blood or the saliva. This means that someone could plant another person’s DNA ata crime scene, causing the person whose DNA was found to be considered a prime suspect in a case.While this does not mean that DNA evidence will no longer be important, it reinforces that solvingcrimes must continue to rely on more than science to find a guilty party.
11. What is the primary purpose of this passage?
(A) to show that DNA is a powerful investigative tool
(B) to illustrate how the unique characteristics of DNA make different types of comparisons andeliminations possible
(C) to teach the reader that identical twins have the same DNA
(D) to show how laboratory technicians develop DNA profiles

參考答案

答案：A
難度：非常困難0
統計：A(0),B(0),C(0),D(1),E(0)

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