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Which of the following conditions or treatments would lead to a decrease in expression for a eukaryotic gene?

Which of the following conditions or treatments would lead to a decrease in expression
for a eukaryotic gene?
a) deacetylation of histones in the promoter of the gene
b) methylation of cytosines in the promoter of the gene
c) a mutation in the TATA box from TATA to GAGA
d) two of the above
e) all of the above

If a wild type E. coli strain is grown in a medium with glucose but without lactose, how
many proteins are bound at the promoter of the lac operon (do not include RNA
polymerase or sigma factor in your answer)?
a) 0
b) 1
c) 2
d) 3
e) 4


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Which of the following conditions or treatments would lead to a decrease in expression
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