【多选题】以下关于信号肽说法正确的是
A.
在起始密码子后,有一段编码疏水性氨基酸序列的RNA区域,该氨基酸序列就被称为信号肽序列
B.
信号肽负责把蛋白质引导到细胞含不同膜结构的亚细胞器内
C.
信号序列在结合核糖体上合成后便与膜上特定受体相互作用,产生通道,允许这段多肽链在延长的同时穿过膜结构
【单选题】内在膜蛋白是跨膜蛋白,跨膜通道是由含有多个疏水氨基酸残基的α-螺旋组成的跨膜结构域:
【单选题】内在膜蛋白是跨膜蛋白,跨膜通道是由含有多个疏水氨基酸残基 的 α- 螺旋组成的跨膜结构域,跨膜通道( )。
【简答题】In previous times, people didn't have a solid idea of childhood as being separate from hood. A hundred years ago, no one thought of adolescence. Until recently it was understood as a norm that th...
【判断题】大型工程系统和管理系统是两类完全不同的大规模复杂系统。
【单选题】Discoveries in science and technology are thought by “ untaught minds ” to come in blinding flashes or as the result of dramatic accidents. Sir Alexander Fleming did not, as legend would have it, look...
A.
A person ignorant of the hard work involved in experimentation.
B.
A citizen of a society that restricts personal creativity.
C.
A person who has had no education.
D.
An individual who often comes up with new ideas by accident.
【简答题】请同学们认真聆听下面一段《美国之声》慢速英语新闻,请大家仔细听并将空缺的单词或词组补充完整。(请注意大小写) Chinese officials say a seafood _____1_______ in Wuhan is thought to be at the center of the outbreak. Officials said one woman may have gotten t...