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) the cell is not able to synthesize lysine
(D) the ribosome will skip a codon every time a UUU is encountered
(E) proteins in the cell will include lysine instead of phenylalanine at amino acid positions specified by the codon UUU