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Q.

An mRNA possess 333 nucleotides (includes start and stop codons). How many amino acids are present in a polypeptide chain formed from it ?

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a

111

b

334

c

110

d

332

answer is A.

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Detailed Solution

There are 333 nucleotides in mRNA. 1 codon has 3 nucleotides. Total number of codons= 333/3= 111. But stop codon does not code for any amino acid.  Hence 111-1= 110 amino acids will be present in the polynucleotide chain.

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