(a) 261
(b) 264
(c) 535
(d) 549
[CBSE AIPMT 1994]
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Aug 09, 2021
The number of base substitution possible in amino acid codons is
The number of base substitution possible in amino acid codons is
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Correct Option (d)
Reason : There are 64 codons out of which 61 codes for amino acid. Each codon possess 3 bases which can undergo transition and transversion, so the number of base substitution possible in amino acid codons is 61 x 3² = 549.