18) Which of the following describes enhancers? They may contain binding sites for both activators and repressors They...

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Biology

18) Which of the following describes enhancers?
They may contain binding sites for both activators andrepressors
They regulate gene expression in prokaryotes
They can only be located upstream of the coding sequence of aregulated gene.
they only work if an insulator is located between the enhancerand its regulated gene
all of the above
20)
A single-base change occurs in the 5' splice site of a gene,resulting in a loss-of-function mutation. Scientists have found asuppressor mutation: a mutation in a second gene that counteractsthe first mutation. Which of the following is most likely tosuppress the original loss-of-function phenotype?
A mutation in the 3' splice site
A mutation in the intron
A mutation in an snRNP
A mutation in a tRNA

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4.1 Ratings (836 Votes)

18 They regulate gene expression in prokaryotes Enhancer sequences are regulatory DNA sequences that when bound by specific proteins called transcription factors activators enhance the transcriptionof an associated genes These See Answer

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18) Which of the following describes enhancers? They may contain binding sites for both activators and repressors They...

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Biology

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		They may contain binding sites for both activators andrepressors
		They regulate gene expression in prokaryotes
		They can only be located upstream of the coding sequence of aregulated gene.
		they only work if an insulator is located between the enhancerand its regulated gene
		all of the above

		A mutation in the 3' splice site
		A mutation in the intron
		A mutation in an snRNP
		A mutation in a tRNA