(b) Name and explain the process the RNA molecule transcribed from 8000 nucleotide long DNA undergoes to be able to translate a polypeptide of 400 amino acids.
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Splicing is essential in eukaryotes for producing functional mRNA.
Process: Splicing.
Explanation: During splicing, noncoding regions (introns) are removed from the premRNA, leaving only coding regions (exons) to form mature mRNA. This ensures the correct sequence for translating into a 400 amino acid polypeptide.