Definitions/Explanation : Splicing & Operator gene
Definitions/Explanation : Splicing & Operator gene
$(1)$ The primary transcripts contain both the exons and introns and are non-functional. Hence it is subjected to a process called splicing where introns are removed and exons are joined in a defined order.
$(2)$ It gives passage to $RNA$ polymerase moving from promotor to structural gene i.e. it control. activity of structural gene.
Similar Questions
Select the two correct statements out of the four $(i-iv)$ given below about lac operon.
$i.$ Glucose or galactose may bind with the repressor and inactivate it.
$ii.$ In the absence of lactose, the repressor binds with the operator region.
$iii.$ The z-gene codes for permease.
$iv.$ This was elucidated by Francois Jacob and Jacque Monod.
Select the two correct statements out of the four $(i-iv)$ given below about lac operon.
$i.$ Glucose or galactose may bind with the repressor and inactivate it.
$ii.$ In the absence of lactose, the repressor binds with the operator region.
$iii.$ The z-gene codes for permease.
$iv.$ This was elucidated by Francois Jacob and Jacque Monod.
Genes that are involved in turning on or off the transcription of a set of structural genes are called
Genes that are involved in turning on or off the transcription of a set of structural genes are called
- [AIPMT 1998]
In Operon concept, the regulator gene regulates chemical reactions in the cell by
In Operon concept, the regulator gene regulates chemical reactions in the cell by
- [AIIMS 1985]
$A$ : Single $DNA$ dependent $RNA$ polymerase catalyses transcription of all types of $RNA$ in all except bacteria.
$R$ : Structural genes in bacteria are monocistronic.
$A$ : Single $DNA$ dependent $RNA$ polymerase catalyses transcription of all types of $RNA$ in all except bacteria.
$R$ : Structural genes in bacteria are monocistronic.
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 :
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]