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  • During elongation phase in prokaryotes ___ subunit plays a vital role as it allows the core enzyme to proceed in order to synthesize mRNA in ____ direction.   <div class='qna-o

During elongation phase in prokaryotes ___ subunit plays a vital role as it allows the core enzyme to proceed in order to synthesize mRNA in ____ direction. 
 

Option: 1

alpha , 5’-3’
 


Option: 2

sigma , 5-3’
 


Option: 3

alpha , 3’-5’
 


Option: 4

sigma , 3’-5’
 


Answers (1)

best_answer

 

 

As learnt in Process of Transcription in Prokaryotes -

 

  • The transcription elongation phase begins with the release of the σ subunit from the polymerase. 
  • The dissociation of σ allows the core enzyme to proceed along with the DNA template, synthesizing mRNA in the 5' to 3' direction at a rate of approximately 40 nucleotides per second.
  • As elongation proceeds, the DNA is continuously unwound ahead of the core enzyme and rewound behind it.
  • Hence, the correct option is (b).
     
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manish

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