In protein biosynthesis
A) each amino acid recognizes its codon on the mRNA template because of structural specificity.
B) exactness of read-out is assured by the presence of traces of DNA on the ribosome.
C) each amino acid is first attached to tRNA that has an anticodon specific for the amino acid.
D) a given codon-anticodon pair must have identical base sequences to avoid the formation of degenerate proteins.
E) each amino acid recognizes its codon through recognition nucleotides in its specific transfer RNA molecule.
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