Which of the following is false regarding regulation of gene expression in bacteria?

• A. Operons are a common feature in bacterial gene regulation.
• B. Repressors can bind to operator regions to inhibit transcription in bacteria.
• C. Bacteria use enhancers to regulate gene expression.
• D. Bacterial gene expression is often regulated at the transcriptional level.

Answer: (C)

Verified step by step guidance

1. Understand that gene expression regulation in bacteria often involves operons, which are clusters of genes under the control of a single promoter and are transcribed together.
2. Recognize that repressors are proteins that can bind to operator regions within operons to prevent transcription by blocking RNA polymerase from transcribing the genes.
3. Note that bacterial gene expression is primarily regulated at the transcriptional level, meaning that the control of gene expression occurs as the DNA is being transcribed into RNA.
4. Identify that enhancers are DNA sequences that increase the rate of transcription and are typically found in eukaryotes, not bacteria. Bacteria do not use enhancers for gene regulation.
5. Conclude that the statement 'Bacteria use enhancers to regulate gene expression' is false because enhancers are not a mechanism used by bacteria for gene regulation.