Explain Q 113.

113.  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 ?

(A)  624                                    (B)  20                               (C)  124                            (D) 3124 

Dear student,    
​Please find below the solution to the asked query     
                                                          
If a genetic code of a certain life form consists of five unique nucleotides and each codon consists of four bases, then by using permutation combination i.e 54(5x5x5x5), it would generate 625 codons.
Since one codon is stop codon, then maximum number of unique amino acids this life form can use are 624.
Hence, option (A) is correct.
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