Which Statement About S

question 49

Multiple Choice

Which statement about S. pyogenes and strep throat pathogenesis is False?

• A) S. pyogenes strains that produce streptococcal pyrogenic exotoxins are lysogens.
• B) Streptococcal pyrogenic exotoxins are A-B toxins that bind to host cells using the B portion.
• C) Streptolysins O and S produced by S. pyogenes destroy blood cells by making holes in their cell membranes.
• D) Spread of S. pyogenes is aided by streptokinase, an enzyme that breaks down blot clots.
• E) The hyaluronic acid capsule of S. pyogenes helps it avoid the innate immune defenses.

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Definitions:

First-degree Price Discrimination

A pricing strategy where a seller charges the maximum possible price for each unit consumed, tailored to the buyer's willingness to pay.

Incremental Revenue

The additional income received from selling one more unit of a product or service.

Marginal Revenue

The additional income received from selling one more unit of a good or service; it is a critical concept in deciding the optimal quantity of goods to produce.

Price Discrimination

The practice of charging different prices to different consumers for the same product or service, based on their willingness to pay.