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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Definitions:

Behaviors Increase

A rise in the frequency or intensity of actions or mannerisms.

Punishment

In operant conditioning, the process in which a behavior is followed by an aversive or unpleasant outcome that decreases the likelihood of a response.

Social Communication

The exchange of information and expressions between individuals through verbal and non-verbal means.

Classical Conditioning

A learning process that occurs when two stimuli are repeatedly paired; a response that is at first elicited by the second stimulus is eventually elicited by the first stimulus alone.