Question

Match each term associated with genes and control of gene expression with the appropriate description. A transcriptional unit" that consists of promoter multiple genes under the control of a single regulatory element. A transcriptional regulatory protein (prokaryotic or eukaryotic) which works by turning on or increasing gene transcription. activator The region of a gene to which RNA polymerase binds. Enhancer A transcriptional regulatory protein prokaryotic or eukaryotic) which works by turning off or decreasing gene transcription. repressor A molecule that binds to a transcriptional regulatory protein in prokaryotes in order to modify its DNA binding allosterically. inducer A regulatory sequence within a prokaryotic gene that is bound to by a transcriptional regulatory protein. operator A single mRNA molecule which contains multiple transcribed genes. operon A (distal) regulatory sequence within a eukaryotic gene that when bound to by a transcriptional regulatory protein will turn off or decrease transcription. Silencer

Answer 1

1. A "transcription unit" that consist of multiple genes under the control of single regulatory element is called as operon

2. A transcription regulatory protein which works by increasing the gene expression is called as activator.

3. The region of gene to which RNA polymerase bind is called as promoter.

4. A transcription regulatory protein which works by decreasing the gene expression is called as repressor.

5. A molecule that binds to transcriptional regulatory protein in order to bind it's DNA binding allosterically is called as inducer.

6. A regulatory sequence within prokaryotic gene that is bound to have transcription regulatory unit is called operator.

7. A single mRNA molecule which contain multiple transcribed genes are called as operon or polycistronic mRNA

8. A regulatory sequence within eukaryotic genome will turn off or decrease transcription is called as silencers.