Certain Bacterial Exotoxins, Such as Cholera and Pertussis, Are Useful

question 35

Multiple Choice

Certain bacterial exotoxins, such as cholera and pertussis, are useful in defining the steps and proteins in signal transduction pathways. Which of the following reactions best accounts for this toxin property?

• A) activation of specific lipid kinases
• B) covalent modification of heterotrimeric G proteins
• C) high?affinity binding to nuclear receptors
• D) inhibition of cyclic nucleotide hydrolysis
• E) rapid release of Ca²⁺ into cytosol

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Definitions:

Conversion Disorder

A mental health condition where a person has blindness, paralysis, or other nervous system symptoms that cannot be explained by medical evaluation.

Compulsive

Pertaining to behavior performed persistently and repetitively without rational motivation, often to the detriment of the individual's well-being.

Obsessive

Characterized by persistent, intrusive, and unwanted thoughts or behaviors that are difficult to suppress or ignore.

Phobic

Pertaining to an irrational and excessive fear of a particular object, situation, or activity.