题干

下列关于染色体,DNA、基因三者之间关系的叙述中,不正确的是(  )

A:DNA主要存在于染色体上

B:DNA上的片段都是基因

C:一条染色体上有一个DNA分子

D:一个DNA分子含一个基因

上一题 下一题 0.0难度 选择题 更新时间:2018-12-03 09:43:55

答案(点此获取答案解析)

B,D

同类题2

      So far, there have been so many successful men and women in the world. And it's no surprise for many of us to dream of doing business when we grow up. However, Moziah Bridge tells us quite different story.

      Moziah Bridges is now the CEO of his Mo's Bow's company. He has already earned $200,000 by selling bow ties and other men's fashion accessories(饰品). The boy designs all the bow ties together with seven other workers in the company, including his mother and grandmother.

    “Mo is the CEO of the company, but I am the CEO of Mo,”Bridges' grandma said.

About four years ago, when Bridges went shopping for bow ties, he found they were in ugly" black and red. He wanted a change. So he asked his grandma to teach him to sew(缝纫)and finally he developed the talent of creating bow ties. Though his very first bow tie didn't look nice, the young sewer kept on practicing. He used colorful cloth with different pictures. Then his parents and friends started to like his works.

       At first he tried to sell them online to several stores in the south. Soon Mo's bow ties became popular. With the help of Dayond John, CEO of the famous US clothes brand FUBU, Bridges built his own company. Not only did Daymond John provide money for him, but also produced Bridges to the circle of fashion and business industries.

      Now the 13-year-old's business has developed rapidly. So you can just start now! You don't have to wait till you're older. If you have a dream, go for it!