If genetic code is tetraplet then what is the possible number of codons which code 20 types of amino acids?

261

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256

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Solution

The correct option is C 256
At any given position in a nucleic acid, there are four possible nucleotides which can occur. There are two nucleotides containing purine bases and two containing pyrimidine bases. If the genetic codon is tetraplet, there will be 4x4x4x4 or 256 possible codons to code for 20 amino acids.
Thus, the correct answer is option C.

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