A: Operator gene is functional when it is not | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(C) The Assertion is correct because the operator gene acts as a switch; when the repressor protein binds to it,transcription is blocked. When the rep

Vedclass · Accepted Answer

Assertion is correct,but Reason is incorrect.

Vedclass · Answer

(C) The Assertion is correct because the operator gene acts as a switch; when the repressor protein binds to it,transcription is blocked. When the repressor is absent or inactivated,the operator is free,allowing $RNA$ polymerase to transcribe the structural genes.The Reason is incorrect because the regulator gene produces a repressor protein,which can be either active or inactive depending on the operon type (inducible or repressible). It does not produce 'only active protein' that acts on the system; rather,the repressor's activity is modulated by inducers or corepressors.

$A$: Operator gene is functional when it is not blocked by repressor.
$R$: Regulator gene produces active protein only which acts on operon system in $E. coli$.

Similar Questions

Structural gene is monocistronic $- P$
Structural gene is polycistronic $- Q$
Select the correct option for $P$ and $Q$.
$\quad\quad\quad P \quad\quad Q$

Which of the following is required as inducer$(s)$ for the expression of $Lac$ operon?

What happens if an $ATT$ sequence appears in the middle of the template strand of the $Lac\, y$ gene?

What are promoter,operator,and structural genes?

In the $lac$ operon model,to which site does the repressor protein bind?

Vedclass Test Series

Exam Paper Generator

Online Exam Module

$A$: Operator gene is functional when it is not blocked by repressor.$R$: Regulator gene produces active protein only which acts on operon system in $E. coli$.