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Removal of introns and joining the exons in a defined order in a transcription unit is called
A
Capping
B
Splicing
C
Tailing
D
Transformation
Detailed Solution
In eukaryotes the primary transcript (hnRNA) contains both exons (coding sequences) and introns (non-coding sequences) and is non-functional.
It undergoes splicing, in which the introns are removed and the exons are joined in a defined order.
In capping, an unusual nucleotide (methyl guanosine triphosphate) is added to the 5′ end of hnRNA.
In tailing, adenylate residues (200–300) are added at the 3′ end in a template-independent manner.
Transformation is the uptake of foreign DNA by a cell.
Hence the process is splicing.
It undergoes splicing, in which the introns are removed and the exons are joined in a defined order.
In capping, an unusual nucleotide (methyl guanosine triphosphate) is added to the 5′ end of hnRNA.
In tailing, adenylate residues (200–300) are added at the 3′ end in a template-independent manner.
Transformation is the uptake of foreign DNA by a cell.
Hence the process is splicing.