Multiple Choice
Why are identical twins considered ideal subjects for studying epigenetics?
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16. Regulation of Expression
Introduction to Eukaryotic Gene Regulation
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Which of the following is true for enhancer elements in eukaryotic gene regulation?
A
Enhancer elements directly bind to RNA polymerase to initiate transcription.
B
Enhancer elements are only found in prokaryotic organisms.
C
Enhancer elements are always located immediately upstream of the promoter.
D
Enhancer elements can increase the transcription of genes located far from them.
Verified step by step guidance1
Understand that enhancer elements are DNA sequences that can increase the transcription of genes, and they are a key part of eukaryotic gene regulation.
Recognize that enhancer elements do not directly bind to RNA polymerase. Instead, they bind to specific proteins called transcription factors, which then interact with the transcription machinery.
Note that enhancer elements are not exclusive to prokaryotic organisms; they are primarily found in eukaryotes.
Enhancer elements can be located at various distances from the promoter, not always immediately upstream. They can be upstream, downstream, or even within introns of the gene they regulate.
Conclude that the correct statement is that enhancer elements can increase the transcription of genes located far from them, due to their ability to loop the DNA and bring transcription factors in contact with the promoter region.
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