What Would Be the Consequence of a Mutation in a Bacterial

question 22

Multiple Choice

What would be the consequence of a mutation in a bacterial cell that produces a defective aminoacyl-tRNA synthetase that attaches a lysine instead of the normal phenylalanine to tRNAs with the anticodon AAA?

• 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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