If there are 4 nucleotides instead of 3 in codon, how many amino acids may be formed
4
16
21
256
Codons consisting of two nucleotides each could provide for only 16 (42) specific codons, whereas codons of three nucleotides could provide 64 (43) specific codons. Similarly codons with 4 nucleotides could provide 256(44) specific codons
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