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Question
Give any two features of Genetic Code.
Solution
Feature of genetic code:
- The codon is triplet. 61 codons code for amino acids and 3 codons do not code for any amino acids, hence they function as stop codons.
- One codon codes for only one amino acid, hence, it is unambiguous and specific
- Some amino acids are coded by more than one codon, hence the code is degenerate.
- The codon is read in mRNA in a continuous fashion. There are no punctuations.
- The code is nearly universal: for example, from bacteria to human UUU would code for Phenylalanine (phe). Some exceptions to this rule have been found in mitochondrial codons, and in some protozoans.
- AUG has dual functions. It codes for Methionine (met) , and it also act as initiator codon.
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