Which of the Following Is an Example of a Public

question 21

Multiple Choice

Which of the following is an example of a public good?

• A) Amtrak rail transport services
• B) Services of the U.S. Post Office
• C) The provision of medical care
• D) The provision of national defense

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Definitions:

Viroids

Small, circular RNA molecules that infect plants, lacking a protein coat.

Retroviruses

A type of virus that inserts a copy of its RNA genome into the DNA of a host cell it invades, changing the genome of that cell, such as HIV.

Prions

Infectious agents composed solely of protein, known to cause rare neurodegenerative diseases.

DNA OR RNA

Nucleic acids that carry genetic information (DNA) or are involved in protein synthesis (RNA).