Translation and Regulation
What is the direct cause of cell death by diphtheria toxin?

Induction of apoptosis
Inactivation of a translational elongation factor
Formation of an ion channel in the cell membrane
None of these

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Translation and Regulation
A quorum sensing system

controls the activity of ribosomes directly
consists of a sensor component that phosphorylates a regulatory protein
detects a signal from the external environment
senses a compound produced by the bacterium itself

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