Ch 23 The Regulation of Gene Expression

Terms in this set (178)

The diagram below shows two stretches of DNA in the genome of an imaginary eukaryotic cell. The top stretch of DNA includes the fantasin gene, along with its promoter and one of its enhancers. The bottom stretch of DNA includes the imaginin gene, its promoter, and one of its enhancers. The slash marks (//) indicate that more than 1,000 nucleotides separate the promoter and enhancer of each gene.
(order of parts from upstream to downstream is enhancer (in fantansing gene have A, B, C sections. in imaginin gene have D, E, C sections within)-->promoter-->fantasin or imaginin gene)
Which statements about the regulation of transcription initiation in these genes are true? Select all that apply.
The fantasin gene and the imaginin gene have identical enhancers.
The fantasin gene will be transcribed at a high level when activators specific for control elements A, B, and C are present in the cell.
Control elements C, D, and E are distal control elements for the imaginin gene.
Both the fantasin gene and the imaginin gene will be transcribed at high levels when activators specific for control elements A, B, C, D, and E are present in the cell.
Both the fantasin gene and the imaginin gene will be transcribed at high levels whenever general transcription factors are present in the cell.
The imaginin gene will be transcribed at a high level when repressors specific for the imaginin gene are present in the cell.
Control elements A, B, and C are proximal control elements for the fantasin gene.
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