For a tetranucleotide sequence, the number of possible combinations using A, T and G are
For a tetranucleotide sequence, the number of possible combinations using A, T and G are
Select an option to attempt
Correct Answer: Option D
Explanation
Tetranucleotide sequences using only 3 of the 4 standard DNA/RNA bases (here: A, T, and G — cytosine excluded). For each of the 4 nucleotide positions, there are 3 choices (A, T, or G). By the fundamental counting principle for independent events: Total combinations.