题目内容
（请给出正确答案）
PTK is used to ______.
A．locate one's birth place
B．promote genetic research
C．identify parent-child kinship
D．choose children for adoption
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（由简答题聘请的专业题库老师提供的解答）
更多“PTK is used to ______.A．locate one's birth placeB．promote genetic researchC．identify paren”相关的问题
According to the passage, what is PTK used to？
A．To locate one's birth place.
B．To promote genetic research.
C．To find out if one is the father of a child.
D．To help improve one's intelligence.
Questions are based on the following passage.
It is a wise father that knows his own child， but today a man can boost his paternal （fatherly）wisdom —— or at least confirm that he"s the kid"s dad. All he needs to do is shell out $30 forpaternity testing kit （PTK） at his local drugstore —— and another $120 to get the results.
More than 60，000 people have purchased the PTKs since they first become availablewithout prescriptions last years， according to Doug Fogg， chief operating officer ofIdentigene， which makes the over-the-counter kits. More than two dozen companies sell DNAtests directly to the public， ranging in price from a few hundred dollars to more than $2，500.
Among the most popular: paternity and kinship testing， which adopted children can useto find their biological relatives and families can use to track down kids put up for adoption，DNA testing is also the latest rage among passionate genealogists —— and supports businessesthat offer to search for a family"s geographic roots.
Most tests require collecting cells by webbing saliva （唾液） in the mouth and sending it tothe company for testing. All tests require a potential candidate with whom to compare DNA.
But some observers are skeptical. "There is a kind of false precision being hawked bypeople claiming they are doing ancestry testing，" says Trey Duster， a New York Universitysociologist. He notes that each individual has many ancestors —— numbering in the hundredsjust a few centuries back. Yet most ancestry testing only considers a single lineage （世系），either the Y chromosome （染色体） inherited through men in a father"s line or mitochondrial（线粒体） DNA， which is passed down only from mothers. This DNA can reveal geneticinformation about only one or two ancestors， even though， for example， just three generationsback people also have six other great-grandparents or， four generations back，14 other great-great-grandparents.
Critics also argue that commercial genetic testing is only as good as the referencecollections to which a sample is compared. Databases used by some companies don"t relyon data collected systematically but rather lump together information from different researchprojects. This means that a DNA database may have a lot of data from some regions and notothers， so a person"s test results may differ depending on the company that processes theresults.
According to the passage， what is PTK used to？ 查看材料
A.To locate one"s birth place.
B.To promote genetic research.
C.To find out if one is the father of a child.
D.To help improve one"s intelligence.
It is a wise father that knows his own child, but today a man can boost his paternal(fatherly)wisdom — or at least confirm that hes the kids dad. All he needs to do is shell out $30 for paternity testing kit(PTK)at his local drugstore — and another $120 to get the results.
More than 60,000 people have purchased the PTKs since they first become available without prescriptions last years, according to Doug Fogg, chief operating officer of Identigene, which makes the over-the-counter kits. More than two dozen companies sell DNA tests directly to the public, ranging in price from a few hundred dollars to more than $2,500.
Among the most popular: paternity and kinship testing, which adopted children can use to find their biological relatives and families can use to track down kids put up for adoption, DNA testing is also the latest rage among passionate genealogists — and supports businesses that offer to search for a familys geographic roots.
Most tests require collecting cells by webbing saliva(唾液)in the mouth and sending it to the company for testing. All tests require a potential candidate with whom to compare DNA.
But some observers are skeptical. "There is a kind of false precision being hawked by people claiming they are doing ancestry testing," says Trey Duster, a New York University sociologist. He notes that each individual has many ancestors — numbering in the hundreds just a few centuries back. Yet most ancestry testing only considers a single lineage(世系), either the Y chromosome(染色体)inherited through men in a fathers line or mitochondrial(线粒体)DNA, which is passed down only from mothers. This DNA can reveal genetic information about only one or two ancestors, even though, for example, just three generations back people also have six other great-grandparents or, four generations back, 14 other great-great-grandparents.
Critics also argue that commercial genetic testing is only as good as the reference collections to which a sample is compared. Databases used by some companies dont rely on data collected systematically but rather lump together information from different research projects. This means that a DNA database may have a lot of data from some regions and not others, so a persons test results may differ depending on the company that processes the results.
According to the passage, what is PTK used to？
A．locate one"s birth place.
B．promote genetic research.
C．find out if one is the father of a child.
D．help improve one"s intelligence.
More than 60,000 people have purchased the PTKs since they first become available without prescriptions last years, according to Doug Fog, chief operating officer of Identigene, which makes the over-the-counter kits. More than two dozen companies sell DNA tests Directly to the public , ranging in price from a few hundred dollars to more than $2500.
Among the most popular : paternity and kinship testing , which adopted children can use to find their biological relatives and latest rage a many passionate genealogists-and supports businesses that offer to search for a family’s geographic roots .
Most tests require collecting cells by webbing saliva in the mouth and sending it to the company for testing. All tests require a potential candidate with whom to compare DNA.
But some observers are skeptical, “There is a kind of false precision being hawked by people claiming they are doing ancestry testing,” says Trey Duster, a New York University sociologist. He notes that each individual has many ancestors-numbering in the hundreds just a few centuries back. Yet most ancestry testing only considers a single lineage, either the Y chromosome inherited through men in a father’s line or mitochondrial DNA, which a passed down only from mothers. This DNA can reveal genetic information about only one or two ancestors, even though, for example, just three generations back people also have six other great-grandparents or, four generations back, 14 other great-great-grandparents.
Critics also argue that commercial genetic testing is only as good as the reference collections to which a sample is compared. Databases used by some companies don’t rely on data collected systematically but rather lump together information from different research projects. This means that a DNA database may differ depending on the company that processes the results. In addition, the computer programs a company uses to estimate relationships may be patented and not subject to peer review or outside evaluation.
26.In paragraphs 1 and 2 , the text shows PTK’s ___________.
[A]easy availability
[B]flexibility in pricing
[C] successful promotion
[D] popularity with households
A、PTK能使蛋白质分子上酪氨酸残基磷酸化
B、PTP能使蛋白质分子中已磷酸化酪氨酸残基脱磷酸化
C、PTK常活跃在信号转导的启始阶段和上游阶段
D、上列A、B和C三项
More than 60,000 people have purchased the PTKs since they first became available without prescriptions last years, according to Doug Fogg, chief operating officer of Identigene, which makes the overthecounter kits. More than two dozen companies sell DNA tests directly to the public, ranging in price from a few hundred dollars to more than $2500.
Among the most popular : paternity and kinship testing , which adopted children can use to find their biological relatives and families can use to track down kids put up for adoption. DNA testing is also the latest rage among passionate genealogists—and supports businesses that offer to search for a family’s geographic roots.
Most tests require collecting cells by swabbing saliva in the mouth and sending it to the company for testing. All tests require a potential candidate with whom to compare DNA．
But some observers are skeptical, “There is a kind of false precision being hawked by people claiming they are doing ancestry testing,” says Trey Duster, a New York University sociologist. He notes that each individual has many ancestors—numbering in the hundreds just a few centuries back. Yet most ancestry testing only considers a single lineage, either the Y chromosome inherited through men in a father’s line or mitochondrial DNA, which is passed down only from mothers. This DNA can reveal genetic information about only one or two ancestors, even though, for example, just three generations back people also have six other greatgrandparents or, four generations back, 14 other greatgreatgrandparents.
Critics also argue that commercial genetic testing is only as good as the reference collections to which a sample is compared. Databases used by some companies don’t rely on data collected systematically but rather lump together information from different research projects. This means that a DNA database may have a lot of data from some regions and not others, so a person’s test results may differ depending on the company that processes the results. In addition, the computer programs a company uses to estimate relationships may be patented and not subject to peer review or outside evaluation.
第26题：In paragraphs 1 and 2 , the text shows PTK’s
A．easy availability.
B．flexibility in pricing.
C．successful promotion.
D．popularity with households.
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