If all the nucleotides are present with equal frequencies and at random, what are the chances of having a particular four nucleotide long motif?
A. 1/256
B. 1/64
C. 1/16
D. 1/8
Explanation: There are four nucleotide bases present in a DNA sequence A, T, C and G. If the bases are present with equal frequency and at random the chances of having a particular 4 nucleotide long motif is 1/ (4*4)= 1/256.