A Mutant Bacterial Cell Has a Defective Aminoacyl Synthetase That

question 29

Multiple Choice

A mutant bacterial cell has a defective aminoacyl synthetase that attaches a lysine to tRNAs with the anticodon AAA instead of a phenylalanine. The consequence of this for the cell will be that

• 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.
• E)None of the above will occur; the cell will recognize the error and destroy the tRNA.

Discern the validity and implications of the "gateway" theory in substance misuse.

Describe the challenges in assessing substance use in adolescents.

Understand the long-term risks associated with early adolescent substance misuse.

Compare the effects of alcohol on adolescents versus adults.

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Definitions:

Park Admission

The fee charged or the permission granted to enter a park.

Fallacy Of Composition

An error in reasoning that arises from assuming that what is true of the parts must also be true of the whole.

Slippery Slope Fallacy

A logical fallacy suggesting that one small step will inevitably lead to a chain of related negative events.

Slippery Slope Fallacy

A logical fallacy that occurs when an argument falsely assumes that one action will lead to a series of other actions resulting in a negative outcome, without providing evidence for such a causal chain.