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Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
Priyanshu kumar Best Answer
option A Explanation:- 10 Nucleotides at each stands. You don't consider both stand for this question because both stands are complementary in nature. We know 4 bases in DNA - A,T,C,G . Now any 4 nucleotides can seat at any particular position of DNA , then probability of Single nucleotide for any particular position is 1/4. This such type of same probability occurred at all 10 nucleotides position. So, Answer is (1/4 x 1/4 x 1/4 x 1/4 x 1/4 x 1/4 x 1/4 x 1/4 x 1/4 x 1/4 ) = (1/4)^10 .