試題詳解

8. A mutant bacterial cell has a defective aminoacyl-tRNA synthetase that attaches a lysine to tRNAs with the anticodon AAA instead of the normal phenylalanine. The consequence of this for the cell will be that _______. 
(A) the positions of phenylalanine in proteins will still encode phenylalanine.
(B) the cell will compensate for the defect by attaching phenylalanine to tRNAs with lysine-specifying anticodons.
(C) proteins in the cell will include lysine instead of phenylalanine at amino acid positions specified by the codon UUU.
(D) the ribosome will skip a codon every time a UUU is encountered.
(E) No phenylalanine will be encoded.