In eukaryotes there are several different types of RNA polymerase. RNA polymerase II is involved<span> in transcription of MRNA for a globin protein.</span>
The operon is effectively the center of transcriptional control. In addition to its main structural genes, the operon houses an operator and a promoter. In front of the promoter lies a regulatory gene that produces repressor proteins. When a repressor is in its active state, it binds to the operator.
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D would be the answer to this question
Answer:
( A. joints between long bones )
