Biology
Biology, 12.02.2020 20:49, alyssatamayo641

Which describes a promoter?
A .the first part of an operon that regulates where, when, and to what level a gene is expressed
B. the part of an operon that, if attached by a repressor protein, suppresses the expression of a gene
C .a cluster of genes that are expressed or repressed as a group
D .an enzyme that helps DNA unzip prior to transcription

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Which describes a promoter?
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