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प्रश्न
Explain the processing the hnRNA needs to undergo before becoming functional mRNA eukaryotes.
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उत्तर
The precursor of mRNA, i.e. hnRNA, contains both introns and exons. Introns are removed and exons are joined by a process called splicing.
The remaining mRNA is processed in two ways:
(1) Capping: Methyl guanosine triphosphate is added to the 5′ end of hnRNA.
(2) Tailing: Adenylate residues are added to the 3′ end of hnRNA.
When hnRNA is fully processed, it is known as mRNA, which is transported out of the nucleus to get translated.
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संबंधित प्रश्न
Describe the process of transcription in bacteria
Explain the process of transcription in prokaryotes.
(i) Name the scientist who suggested that the genetic code should be made of a combination of three nucleotides.
(ii) Explain the basis on which he arrived at this conclusion.
Briefly describe the following:
Transcription
Transcription is the transfer of genetic code from a DNA molecule to:
(i) RNA molecule
(ii) Second DNA molecule
(iii) Ribosomal sub unit·
(iv) Sequence of amino acids in a protein molecule
Explain the mechanism of transcription in a prokaryotic cell.
Name the parts marked ‘A’ and ‘B’ in the given transcription unit:
The process of transfer of genetic information from DNA to RNA/formation of RNA from DNA is ______.
If the sequence of bases in DNA is ATTCGATG, then the sequence of bases in its transcript will be ______.
Read the following and answer from given below:
The translation is the process of polymerization of amino acids to form a polypeptide. The order and sequence of amino acids are defined by the sequence bases in the mRNA. The amino acids are joined by a bond called a peptide bond. The ribosome is the site of protein synthesis.
Which ion is essential for the association of both units of the ribosome at the time of protein formation?
