DNA is composed of four nucleotides, A, C, G and T. Each codon is composed of three nucleotides. The number of possible codons is
A) 16.
B) 4.
C) 12.
D) 64.
E) 32.

Question

Quizplus · Accepted Answer

There are four possible nucleotides that can make up each position of the codon, and there are three positions in each codon. Therefore, the total number of possible codons is 4 x 4 x 4 = 64.

DNA Is Composed of Four Nucleotides, A, C, G and T