题干

关于生物体内遗传信息传递的叙述,正确的是(    )

A:翻译时,每种密码子都有与之对应的反密码子

B:转录开始时,RNA聚合酶必须与基因上的起始密码子结合

C:DNA复制过程中可能发生差错,但是不一定会改变生物的性状

D:逆转录时,碱基互补配对方式与翻译时完全相同

上一题 下一题 0.0难度 选择题 更新时间:2019-01-09 11:07:16

答案(点此获取答案解析)

C

同类题5

阅读理解

    One day. One lifetime. You can do it! From the museum of modern art to the museum of ancient articles, visit our picks for the world's best museums.

National Gallery of Canada (Ottawa)

    This museum has a great collection of art spanning the Middle Ages to the present day, including American, Indian, European, Inuit and Canadian works. It offers a unique, near-complete overview of Canadian art — from early Quebec religious work, through Inuit work from the 1950s, to the contemporaries.

Tokugawa Art Museum (Japan)

    The Tokugawa family reigned over Japan from 1600 to 1868. Under them, the country enjoyed the longest period of peace in its history. This time span is also known as the Edo period, during which the arts flowered in Japan. Artists of this period directly influenced Western masters such as Monet, Gauguin and Whistler and have since gone on to become household names. Other exhibits effectively present, through accurately reproduced environments, aspects of Japanese life at the time.

    Museum of Fine Arts (Boston)

    Highlights of this museum's collection include a 4th-century Christian marble bust (半身像) of St. Paul at prayer, and a painting that questions life and our very existence, Gauguin's “Where do we come from? What are we? Where are we going?” It's a must — go in the US.

The Egyptian Museum (Cairo)

    As well as gathering together some of the finest archaeological finds from all Egypt, this museum also provides a rare opportunity to simply pop in and within minutes be standing face-to-face with one of the greatest works of mankind, Tutankhamun's golden mask. A portrait of unbelievable quality, craftsmanship and beauty, the highly polished gold face — at once a god, a king and a teenager — shines like water: delicate, yet untouchable all at the same time.