If a repressor protein attaches to the operator, RNA polymerase cannot proceed to transcribe key enzymes needed by the organism. This can be seen in the trp operon in E .coli bacteria.
When someone smokes cigarettes and drinks three alcoholic beverages a day, he or she is contributing to his or her cancer risk via <span>promotion.
Researchers have discovered that the combination of tobacco and alcohol increases the risk of cancer in </span>throat, oral cavity, esophagus and <span>larynx.
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They are difficult to work with... most ppl don’t want to cook