The Small T Antigen of SV40 Regulates the Cell Cycle

question 17

Multiple Choice

The small T antigen of SV40 regulates the cell cycle of the host cell by DIRECTLY doing which of the following?

• A) Turning on transcription of cyclin D1.
• B) Turning on the activity of the MAP kinase.
• C) Inhibiting the activity of the PP2A phosphatase.
• D) Phosphorylating the transcription factor AP1.
• E) Inactivating the p53 protein.

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Definitions:

Marginal Revenue

The increase in revenue that results from the sale of one additional unit of output.

Monopolistically Competitive

A market structure where many firms sell products that are similar but not identical, allowing for some degree of market power and differentiated competition.

Excess Capacity

The failure to produce enough to minimize average total cost; characteristic of monopolistically competitive firms.

Average Total Cost

The total cost of production (fixed plus variable costs) divided by the total quantity produced.