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Standard X
Biology
RNA
What is a sto...
Question
What is a stop codon and what does it do?
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Solution
Codon :
It is a triplet nucleotide base that codes for an amino acid during translation.
One codon codes for a specific amino acid.
Some codons code for more than one amino acid so-called degenerate codons
The mRNA reads a codon that is contiguous without any punctuation or gaps.
There are 61 codons that encode for 20 amino acids and 3 codons do not code for any amino acid
Stop codon :
A codon that does not code for any amino acid is called a stop codon.
A stop codon stops or halts the process of protein synthesis (translation)in the cell.
There are three stop codons(UAA, UAG, UGA) that do not code for any amino acid.
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Following are the features of the genetic code. What does each one indicate?
Stop codon; Unambigous codon; Degenerate codon; Universal codon. [2]
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