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Differences Among Regulator, Operator, Promoter and Structural Genes!
Regulator Gene:
1. It controls the functioning of operator gene.
2. Regulator gene produces a repressor or Apo repressor for blocking operator gene.
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3. It is commonly a large gene.
4. It functions through the formation of an mRNA of repressor.
Operator Gene:
1. It determines the functioning of structural genes.
2. Operator gene functions only when it is not blocked by repressor.
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3. The gene is small.
4. It function through the presence or absence of repressor.
Promoter Gene:
1. It is site for binding of RNA polymerase.
2. It is functional only when operator gene allows passage of RNA-polymerase to structure genes.
3. The gene is small.
4. It functions by providing recognition and binding sites for RNA polymerase.
Structural Genes:
1. The gene is connected with transcription or formation of mRNA for synthesis of particular polypeptide.
2. Structural gene functions only when receives complementary nucleotides and RNA polymerase.
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3. The gene is moderately long to large depending upon the polypeptide to be synthesized.
4. It functions through the formation of mRNA for structural or enzymatic polypeptide.