In this activity, students investigate the effect that fruit purees (pineapple, kiwifruit, peach) have on the setting of party jellies.

By the end of this activity, students should be able to:

  • describe the action of proteolytic enzymes found in some fresh fruit purees on gelatine
  • name the proteolytic enzymes found in pineapple (bromelin) and kiwifruit (actinidin)
  • explain the temperature sensitivity of these enzymes
  • extrapolate the findings of this activity to the effect raw sliced kiwifruit has on pavlova
  • understand why a fresh pineapple piece held in the mouth for a minute or so can lead to a feeling of discomfort.

Download the Word file (see link below) for:

  • introduction/background notes
  • what you need
  • what to do
  • student worksheets.
    Published 1 July 2011