Definitions/Explanation : A promoter & The structural gene
 

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A promoter is a $DNA$ sequence that provides binding site for $RNA$ polymerase. It is located at $5 '$ end of the structural gene.

- The structural gene in a transcription unit is flanked by a promoter and terminator.

Similar Questions

Which enzyme / enzymes are responsible for transformation of lactose to galactos in the E.coli culture medium.

Match List $-I$ with List $-II$ :

List $-I$ List $-II$
$a$ In lac operon $i$ gene codes for $i$ transacetylase
$b$ In lac operon $z$ gene codes for $ii$ permease
$c$ In lac operon $y$ gene codes for $iii$ $\beta$ - galactosidase
$d$ In lac operon $a$ gene codes for $iv$ Repressor

Choose the correct answer from the options given below :

  • [NEET 2022]

In lac operon model; repressor protein binds to which site

In lac operon, $z$ gene codes for:

  • [NEET 2022]

In the medium where $E$. coli was growing, lactose was added, which induced the lac operon. Then, why does lac operon shut down some time after addition of lactose in the medium?