Genetic mutations: mastery test
 select the correct answer from each drop-down menu.
 the trp operon in e.coli regulates genes that code for enzymes required for synthesis of the amino acid tryptophan. the trp operon is a
 repressible operon. when tryptophan is not available in the environment, the trp repressor protein is v. therefore, rna
 polymerase can bind to the
 v to begin transcription
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