Biology 0610 · IGCSE · Diseases and immunity

Diseases and immunity — practice question

Which statement gives the correct description of the cholera pathogen?

  • AThe bacterium prevents the kidney from absorbing water, so water is secreted into the small intestine, causing diarrhoea.
  • BThe bacterium produces a toxin that causes the secretion of chloride ions into the small intestine, drawing in water by osmosis.
  • CThe virus prevents the kidney from absorbing water, so water is secreted into the small intestine, causing diarrhoea.
  • DThe virus produces a toxin that causes the secretion of chloride ions into the small intestine, drawing in water by osmosis.

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