从酵母中克隆到一段DNA序列具有类似原核生物DNA复制起始点的功能，即
A: USR(upstream replicating sequence)
B: LTR(long terminal sequence)
C: ARS(autonomously replicating sequence)
D: ORF( open reading frame)
A: USR(upstream replicating sequence)
B: LTR(long terminal sequence)
C: ARS(autonomously replicating sequence)
D: ORF( open reading frame)
举一反三
- Which of the<br/>following statements about non-coding DNA is wrong? () A: DNA sequence of non-coding protein. B: DNA sequence of non-coding RNA and protein. C: DNA sequence participating in the regulation of gene expression, but<br/>not coding protein. D: Relate to genome protection.
- RNA polymerase is an enzyme that is responsible for copying a DNA sequence into an RNA sequence, during the process of transcription.（）
- 关于DNA复制起始点,错误的是: A: 大肠杆菌染色体DNA只有一个复制起始点 B: 无论原核真核,复制起始点通常有较多AT碱基 C: 大肠杆菌DNA复制起始点跨度约245bp,有几段重复序列 D: 真核生物线粒体DNA只有一个复制起始点 E: 真核生物染色体DNA有多个复制起始点
- 原核生物每个DNA分子有（）个复制起始点，真核生物DNA分子有（）个复制起始点。
- DNA<br/>polymorphisms(多态性)描述正确的() A: DNA<br/>Length polymorphisms B: DNA<br/>Sequence polymorphisms C: DNA长度多态性 D: DNA序列多态性