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Question 41 of 80

Q.The nucleotide sequence of mRNA into the amino acid sequence of polypeptide is called __________.

(a) Translation
(b) Transcription
(c) Nonsense codon
(d) Genetic code
Puducherry TnboardTamil Nadu HSC (DGE) Board 2018MCQ· 1mImportance★★★★★
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Translation is the process of converting the mRNA nucleotide sequence into a polypeptide's amino acid sequence.

Gene expression proceeds in two major steps: transcription, in which the DNA sequence of a gene is copied into a complementary mRNA molecule, followed by translation, in which that mRNA is read at the ribosome in successive triplets (codons), each specifying a particular amino acid (or a stop signal) according to the genetic code; transfer RNAs bring the correct amino acids to match each codon, and these are joined by peptide bonds to build the polypeptide chain. Transcription (option b) is the earlier, DNA-to-mRNA step, not mRNA-to-protein, so it is incorrect h …

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