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In the genetic dictionary, there are 64 codons as

1. 64 amino acids are to be coded
2. 64 types of tRNAs are present
3. there are 44 nonsense codons and 20 sense codons
4. genetic code is triplet

Correct answer: genetic code is triplet

Solution

There are 4 nucleotide bases, and if codons are made of 3 bases each, the total number of possible codons is 4^3 = 64. This is why the genetic code is called triplet.

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