You Are a Volunteer for Nurses Without Borders and Are

question 53

Multiple Choice

You are a volunteer for Nurses Without Borders and are being sent on a humanitarian mission. You are somewhat concerned because you have learned from the CDC website that antibiotic-resistant Haemophilus influenzae is common in the country to which you are being sent. This encapsulated, Gram-negative bacterium can cause a variety of illnesses, including community-acquired pneumonia. You do some research on the genetics of this pathogen.
-H. influenzae has genes that it needs to make pili for attachment to host cells. These pili genes are not always expressed; sometimes the bacterium turns them off and does not produce pili. This is an example of 

• A) phase variation.
• B) antigenic sensing.
• C) two-component control.
• D) transduction.
• E) gene splicing.

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Definitions:

Dividend Payout

The portion of a company's earnings paid to shareholders as dividends, often expressed as a percentage of the company's total earnings.

Call Option

A financial contract that gives the holder the right, but not the obligation, to buy a stock, bond, commodity, or other asset at a specified price within a specific time period.

Put Option

A financial contract that gives the holder the right, but not the obligation, to sell a specified amount of an underlying asset at a set price within a specified time.

Hedge Ratio

The ratio of the size of a position in a hedging instrument to the size of the position being hedged, intended to minimize risk.