Biology 0610 · IGCSE · Digestive system

Digestive system — practice question

The graph illustrates how pH in the mouth changes after food has been eaten. Why is it sensible to brush your teeth after eating?

  • AAcidic conditions help bacteria to grow.
  • BAcids dissolve tooth enamel.
  • CAlkaline conditions help bacteria to grow.
  • DAlkalis dissolve tooth enamel.

Worked solution & mark scheme

This 1-mark question has a full step-by-step worked solution and mark scheme.

  • Full mark scheme, point by point
  • Step-by-step worked solution
  • Write your answer & get it marked instantly by AI