题目内容

The basic unit of eukaryotic chromosome is:____

A. 30nm fiber
B. Nucleosome
Core particle of nucleosome
D. Histone octamer

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The histone with most species specificity in the nucleosome is:____

A. H1
B. H2A
C. H3
D. H4

The length of DNA fragment in each nucleosome is about:____

A. 100bp
B. 200bp
C. 300bp
D. 400bp

Chromosomal DNA of the eukaryotes is circular in cell. ( )

Plasmid contains origin of replication and can replicates independently in the host cell.( )