Which enzyme folds the bacterial chromosome into supercoiled form?
A. RNA polymerase;
B. DNA polymerase;
C. nuclease
D. gyrase;
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Which statement about bacterial chromosome is not right?
A. Most bacterial chromosome is a haploid genome.
B. The bacterial chromosome folds to be supercoils like a skein of yarn.
C. The bacterial chromosome is located in the nucleoid.
D. The chromosome of Vibrio cholera is of diploid genome.
( )是建设中国特色社会主义的一项基本国策。
A. 一国两制
B. 对外开放
C. 三个有利于
D. 四个现代化
“一国两制”伟大构想的首次公开提出是解决( )问题。
A. 台湾
B. 香港
C. 澳门
D. 钓鱼岛
坚持( )是“和平统一、一国两制”的核心,是发展两岸关系和实现和平统一的基础。
A. 改革开放
B. 一国两制
C. 一个中国原则
D. 独立自主