第二章单元测试
As a whole, the E.coli chromosome is positively supercoiled.（ ）
- In eukaryotic chromosomes, more than ____ of the mass of chromatin is protein.（ ）
- The nucleosomes are wound into left-handed helix, form a solenoid, with around ____ nucleosomes per turn.（ ）
- 5`-CG-3` sequence in mammalian DNA are normally methylated on the ____.（ ）
- Dispersed repetitive DNA is refer to most ____ DNA.（ ）
A:错 B:对
答案:错
A:60% B:40% C:30% D:50%
答案:50%
A:6 B:4 C:3 D:5
答案:6
A:C B:G C:C or G D:C and G
答案:C
A:unique B:moderately repetitive C:None of the above D:highly repetitive
答案:moderately repetitive
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