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प्रश्न
Give the different steps involved in formation of m-RNA from hn-RNA.
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उत्तर
The formation of m-RNA from hn-RNA involves a series of processing steps to convert the primary transcript into a functional mRNA molecule. The key steps involved in the processing of hnRNA to mRNA are as follows:
- Splicing: The primary transcript is non-functional and contains both exons and introns. During processing, only introns are removed by the process called splicing.
- Capping: Exons are joined in a definite sequence (order) by the DNA ligase enzyme. In capping, methylated guanosine triphosphate is added to the 5' end of hnRNA.
- Tailing: In tailing, polyadenylation takes place at the 3' end. It is the fully processed hnRNA, now called m-RNA.
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संबंधित प्रश्न
Attempt any TWO of the following:
Define the terms ‘codon’ and ‘anticodon’.
In following case what will be the corresponding sequence of the transcribed mRNA?
AGGTATCGCAT is a sequence from the coding strand of a gene.
What will be the codon sequence on mRNA formed on template strand if the codon sequence on coding strand of transcription unit is ATG GTG AGC TAC GCG?
In the genetic dictionary, there are 64 codons as ______
A mature mRNA consists of 900 bases without any stop codon in between. What would be the number of amino acids coded by this mRNA during translation?
Genetic code consists of ______.
______ catalyzes polymerization in 5' → 3' direction during transcription.
How many codons will be altered in the following case?
If there are 999 bases in an RNA that codes for a protein with 333 amino acids, and the base at position 901 is deleted such that the length of the RNA becomes 998 bases.
Select the correct option regarding the statements given below.
Statement I: In the process of transcription, the entire length of DNA is copied into RNA.
Statement II: Copying of DNA to RNA in transcription is based on complementarity base pairing.
What is meant by the polarity of genetic code ?
