試題詳解

46. How does the genetic code vary among different species?
(A) There are significant variations in the codon sequences that specify amino acids.
(B) The code is universal in all species except for single-celled organisms.
(C) The code is universal in all species, but there are minor deviations in mitochondria and some single-celled organisms.
(D) The code is completely different in every species.