Question

The diagram of the lac operon from $E. coli$ is shown below. Each letter indicates its components may be used more than once.

Which of the following options is correct in respect of the letters and their functions -

• A. $C$ - the binding site for the repressor protein, $B$ - the binding site for RNA polymerase, $D$ - the structural genes, $A$ - the gene that codes for the repressor protein.
• B. $A$ - the binding site for the repressor protein, $B$ - the binding site for RNA polymerase, $C$ - the structural genes, $D$ - the gene that codes for the repressor protein.
• C. $A$ - the binding site for the repressor protein, $D$ - the binding site for RNA polymerase, $B$ - the structural genes, $C$ - the gene that codes for the repressor protein.
• D. $D$ - the binding site for the repressor protein, $C$ - the binding site for RNA polymerase, $B$ - the structural genes, $A$ - the gene that codes for the repressor protein.

Answer 1

Answer: (A)

Correct answer is (a) $C$ - the binding site for the repressor protein, $B$ - the binding site for RNA polymerase, $D$ - the structural genes, $A$ - the gene that codes for the repressor protein.