How Is the Poly(A)tail Added to the 3' Ends of the MRNAs

question 14

Multiple Choice

How is the poly(A) tail added to the 3' ends of the mRNAs produced during infection with a paramyxovirus?

• A) The viral polymerase stutters at a poly(U) sequence.
• B) The cellular poly(A) polymerase adds it.
• C) Paramyxovirus mRNAs do not have poly(A) tails.
• D) The viral poly(A) polymerase adds it after the mRNA is released from the template.
• E) The entire poly(A) tail is encoded in the genome.

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Definitions:

Laffer Curve

A theory that illustrates the relationship between tax rates and the amount of tax revenue collected by governments.

Deadweight Loss

A loss of economic efficiency that can occur when equilibrium for a good or service is not achieved or is unattainable.

Tax Per Unit

A tax that is levied on a per unit basis, meaning for every unit of a good produced or sold, a certain amount of tax is paid.

Deadweight Loss

A reduction in economic effectiveness that happens when a good or service does not reach, or cannot reach, its equilibrium state.