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State whether the following is true or false.
Cholera toxin acts by blocking a signalling pathway entirely.

  • A.True only at large scales
  • B.False only at small scales
  • C.True
  • D.False

Answer: D

It does the opposite, jamming the pathway permanently on so that cyclic AMP accumulates. The resulting loss of fluid, rather than any tissue damage, is what makes the disease dangerous. Replacing the lost fluid and salts is therefore the essential treatment.

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