Describe the structure of operon.

1.	Describe the structure of operon.
Answer» 1. An operon is a unit of gene expression and regulation. 2. It includes the structural genes and their control elements. Control elements are promoters and operators. 3. The structural genes code for proteins, r-RNA and t-RNA that are necessary for all the cells. 4. Promoters are signal sequences in DNA. They start the RNA synthesis. They also act as sites where the RNA polymerases are bound during transcription. 5. Operators are present between the promoters and structural genes. 6. There is repressor protein that binds to the operator region of the operon. 7. There are regulatory genes which are responsible for the formation of repressors which interact with operators.

Answer»

1. An operon is a unit of gene expression and regulation.

2. It includes the structural genes and their control elements. Control elements are promoters and operators.

3. The structural genes code for proteins, r-RNA and t-RNA that are necessary for all the cells.

4. Promoters are signal sequences in DNA. They start the RNA synthesis. They also act as sites where the RNA polymerases are bound during transcription.

5. Operators are present between the promoters and structural genes.

6. There is repressor protein that binds to the operator region of the operon.

7. There are regulatory genes which are responsible for the formation of repressors which interact with operators.

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