Gene regulation governing lactose operon of E.coli that involves the lac $I$ gene product is
negative and repressible because repressorprotein prevents transcription
feedback inhibition because excess of bgalactosidasecan switch off transcription
positive and inducible because it can beinduced by lactose
negative and inducible because repressorprotein prevents transcription.
The regulatory genes are located
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 :
In Operon concept, regulator gene functions as
In an Ecolistrain $i$ gene gets mutated and its product can not bind the inducer molecule. If growth medium is provided with lactose, what will be the outcome?
Definitions/Explanation : Regulatorgene & Promotergene