A new life from discovered on a distant has a genetic code consisting of five unique nucleotides and only one stop codon. If each codon has four bases, what is the maximum number of unique amino acids this life from can use?

624

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20

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124

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3124

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Solution

The correct option is A $624$
As it is given in the question each codon has four bases, As the new life form has five unique nucleotides there are 5 possible combinations for the first position in the codon. This is repeated for all codons. As there are 4 codons using probability 5x5x5x5= 625 which can be approximated to 624. Thus the correct answer is option A.

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