In a eukaryote, transcription factors called activators may stimulate gene expression by binding to DNA sites called __________.

• A. operons
• B. histones
• C. promoters
• D. silencers
• E. enhancers

Answer: (E)

Verified step by step guidance

1. Understand the role of transcription factors in gene expression. Transcription factors are proteins that help regulate the transcription of genes by binding to specific DNA sequences.
2. Identify the function of activators. Activators are a type of transcription factor that increase the rate of transcription by facilitating the binding of RNA polymerase to the promoter region of a gene.
3. Learn about enhancers. Enhancers are DNA sequences that can be located far from the gene they regulate. They serve as binding sites for activators, which help increase the transcription of the associated gene.
4. Differentiate enhancers from other DNA elements. Unlike promoters, which are located immediately upstream of the gene, enhancers can be located upstream, downstream, or even within introns of the gene they regulate.
5. Recognize the importance of enhancers in gene regulation. Enhancers play a crucial role in the precise control of gene expression, allowing for tissue-specific and developmental stage-specific expression patterns.