Which of the following is an example of how histone modifications help to control gene expression? a When a negatively charged amino acid in a histone tail is neutralized, the interactions between the histone and the associated DNA are stronger and gene expression tends to be weaker b When a histone tail is acetylated, it loosens the DNA wound around it making it more accessible to RNA transcription c When a histone tail is methylated, the individual histone subunits fall apart and gene expression is blocked
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Step 1: Histone modifications play a crucial role in regulating gene expression by altering the accessibility of DNA to transcription factors and RNA polymerase. Show more…
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Which of the following is not a mechanism by which histone modifications influence gene expression? View Available Hint(s) increasing methylation of CpG islands in histones acetylation of amino acids by histone acetyltransferase enzymes modifications to the N-terminal tails of histone proteins changes to histone composition in nucleosomes Submit Previous Answers Incorrect; Try Again; 5 attempts remaining This mechanism does involve histone modifications and does affect gene expression.
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Which of these mechanisms exerts gene control by suppressing transcription in eukaryotes? A. Acetylation of histone proteins B. Methylation of DNA C. Action of activator proteins
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Control of gene expression in eukaryotes includes all of the following except $a$. alternative splicing of RNA transcripts. $b$. binding of proteins to DNA. $c .$ transcription factors. $d$. feedback inhibition of enzyme activity by allosteric control. $e .$ DNA methylation.
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