题干

“科技奥运”是2008年北京奥运会的三大理念之一,而兴奋剂的检测是其中一个重要课题。EPO(促红细胞生成素)是一种传统的兴奋剂,这种兴奋剂可增加血液中红细胞含量,从而提高运动成绩,许多运动员因冒险服用而遭禁赛。若借助于基因治疗手段,将这种兴奋剂的基因注入人体,在身体里形成一个局部的EPO制造基地,那么传统的尿样和血样检测都无法查出,因此将这种基因称为基因兴奋剂。下列有关基因兴奋剂的说法,错误的是(   )

A:基因兴奋剂的表达产物EPO是一种蛋白质,不能口服

B:EPO的合成与核糖体、线粒体有直接关系

C:通过DNA检测,可以查出运动员体内是否加入了基因兴奋剂

D:基因兴奋剂引起的变异属于可遗传变异,产生的物质对人体无副作用

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D

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    For Zack, the shave was more than just a way to fund lifesaving research. It was a way to honor his late brother, Taylor Frink.

    Taylor, a volunteer firefighter in North Carolina, was killed in a car accident last September. Before his passing, Taylor was an eager supporter of St. Baldrick's. He went bald(秃头)for the cause in 2015, supporting kids with cancer and raising money to find cures.

    As a local hero, Taylor was beloved by the community. When he died, more than 1, 000 people attended his funeral to pay their respects. Zack looked up to his brother and this was the reason why he decided to become a junior firefighter himself. They did everything together. Zack remembers.

    Zack knew his brother had planned to shave again in 2016, so without hesitation he decided to fill his shoes and registered to shave at the local St. Baldrick's event in Kinston, N. C.

    “He was always goodhearted, and I want to make my brother proud,” shares Zack.

    As part of Zack's kindnesses, he raised more than $ 1,000 for the St. Baldrick's Foundation primarily by selling T-shirts he designed. Leading up to the event, Zack also visited his city council, commissioner's office and challenged the local official department to get involved.

    “We are not going to let Taylor's name be forgotten. That is what I love about St Baldrick's,” says Jean Culbreth, volunteer event organizer. “Zack gets it. He gets that what he is doing is keeping his brother's name alive.”

    The day finally came and Zack took his seat under the clippers (剪具), not only to honor his brother but to help kids with cancer. It was a special moment for all, and by the end of the day the event had raised more than $ 22,000!