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

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

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Translation and Regulation
The ribosome binding site

forms a stem-loop structure in the RNA
is located upstream of the promoter sequence
is more likely to be associated with an operon than with a gene encoding a single protein
is located immediately upstream of the start codon

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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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