A Researcher Introduces a Signal Produced by Bacteria to Eukaryotic

question 46

Multiple Choice

A researcher introduces a signal produced by bacteria to eukaryotic cells that she is culturing in the laboratory. Remarkably, she notices that this signal results in an increase in eukaryotic gene expression. How is this possible?

• A)This signal is likely similar in structure to ligands utilized by eukaryotic cells.
• B)This signaling pathway might actually be used by both prokaryotes and eukaryotes.
• C)This gene expression is likely independent of the presence of the prokaryotic signal.
• D)This prokaryotic signal likely travels directly into eukaryotic cells and acts as a transcription factor.
• E)The signal is either similar in structure to a ligand used by eukaryotes, or this signaling pathway is used by both prokaryotes and eukaryotes.

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Definitions:

Product Differentiation

The process of distinguishing a product from others in the market to attract a specific target market.

Demand Curve

A graphical representation showing the relationship between the price of a good and the quantity of that good that consumers are willing and able to purchase at various prices.

Economic Profit

The variance between an enterprise's aggregate income and total outlays, taking into account both clear and assumed costs.

Short-Run Equilibrium

The state in a market where supply equals demand within a limited time frame, before any long-term adjustments take place.