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.
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.
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.
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.