[单选题]
The diagram below showsskgesf 2x 4rny ti+pm (9/7:yl the genegmi+vidd: wef /+ c2:stic code.
Which of the following features can be deduced from the genetic code?
I. Codons consisting of different bases can code for the same amino acid
II. Codon AUG does not code for an amino acid
III. mRNA strands coding for a protein will always contain codons that do not code for amino acids
A. I and II only
B. I and III only
C. II and III only
D. I, II and III
