Discussion
In prokaryotes, the sequence in mRNA that is recognized by the small subunit of ribosome during its translation is known as :
Answer: B
The sequence is the Shine-Dalgarno sequence.
In bacteria a purine-rich sequence (consensus AGGAGG) lies a few nucleotides upstream of the start codon on the mRNA. It pairs with a complementary sequence at the 3' end of the 16S rRNA in the small (30S) ribosomal subunit, which positions the ribosome so that the initiation codon sits in the P site.
AUG is the start codon itself, read by the initiator tRNA rather than recognised by base-pairing with rRNA. UAG is a stop codon. The Pribnow box (TATAAT) is a promoter element in DNA recognised by RNA polymerase, not a sequence in mRNA.
Post your comment
Please log in or register to post a comment.
Examination Categories
- SSC Exams
- Banking Exams
- Teaching Exams
- Civil Services Exams
- Railways Exams
- Engineering Recruitment Exams
- Defence Exams
- State Government Exams
- Police Exams
- Insurance Exams
- Nursing Exams
- Other Government Exams
- NRA CET
- PG Entrance Exams
- Campus Placement
- MBA Entrance Exams
- CUET and UG Entrance
- Judiciary Exams
- Regulatory Body Exams
- Software Development