Riboswitch involves: A: taRNA B: crRNA C: hairpin structure D: ta promoter E: cr promoter

启动子（promoter）是指

When only glucose is available to E. coli in the culture medium:  ( ) A: cAMP-CAP is bound to the promoter； B: cAMP-CAP is not bound to the promoter； C: The repressor is not bound to the operator； D: The lac operon is turn on 

Which of the following statements about a protein-coding gene is NOT true? A: An enhancer is not a DNA sequence. B: It may have many exons and introns. C: The promoter region is not transcribed. D: Transcription factors can bind to the promoter region.

Operator is bound by A: activator B: repressor C: promoter D: enhancer E: silencer

leader、promoter、time-keeper、follower、presenter等角色都是无领导小组讨论中的角色。（ )

Which of the followings are composite parts? A: Protein generator B: Inverter C: RBS D: promoter E: enhancer

Which of the following genes are structural genes? (). A: The promoter B: The enhancer C: The silencing D: The guide protein synthesis

The function of β subunit of polymerase is A: Template binding B: Catalytic binding C: Promoter binding D: Cation binding

以下哪个与基因表达激活有关 (Which of the following is associated with activation of gene expression ?) A: H3K4甲基化 (H3K4 methylation) B: H3K9甲基化 (H3K9 methylation) C: DNA promoter的甲基化 (Methylation of DNA promoter) D: 组蛋白的去乙酰化 (Deacetylation of histones)