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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