HIV, the Virus Which Causes AIDS, Interacts with Two Receptors

question 6

Multiple Choice

HIV, the virus which causes AIDS, interacts with two receptors on the host cell membrane: CD4 and CCR5. A small percentage of individuals have a genetic mutation which causes their cells to lack CCR5. These individuals will never develop AIDS nor are they able to pass HIV on to others. Which part of viral replication is being blocked by the lack of a receptor?

• A) The host cell enzymes are unable to replicate the HIV genome.
• B) The virus components cannot be assembled into new virions.
• C) Endocytosis is being prevented.
• D) HIV cannot attach to the host cell without the proper membrane receptor.
• E) Newly assembled virions cannot be released from the host cell.

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Definitions:

Demand Equation

A mathematical expression that calculates the quantity of a good or service demanded at various prices.

Supply Equation

A mathematical representation that describes the relationship between the price of a good and the quantity of the good that suppliers are willing to sell.

Price Floor

A regulatory measure that sets the lowest legal price for a good or service to prevent market prices from dropping below a specified level, ensuring producers' welfare.

Shortage/Surplus

A shortage occurs when demand exceeds supply, while a surplus happens when supply exceeds demand, both of which can lead to market adjustments.