If a Bacteria Contained a Mutant Aminoacyl-TRNA Synthetase That Attaches

question 32

Multiple Choice

If a bacteria contained a mutant aminoacyl-tRNA synthetase that attaches a lysine instead of the normal phenylalanine to tRNAs with the anticodon AAA which of the following would occur?

• A) None of the proteins in the cell will contain phenylalanine.
• B) Proteins in the cell will include lysine instead of phenylalanine at amino acid positions specified by the codon UUU.
• C) The cell will compensate for the defect by attaching phenylalanine to tRNAs with lysine-specifying anticodons.
• D) The ribosome will skip a codon every time a UUU is encountered.

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