• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

Enzymatic Juice Extraction - Does the addition of pectinase, to chopped up apple result in a greater yield of apple juice, than if only water is added?

Extracts from this document...

Introduction

Enzymatic Juice Extraction Research question: Does the addition of pectinase, to chopped up apple result in a greater yield of apple juice, than if only water is added? Hypothesis: I believe that the addition of the pectinase enzyme will lead to a greater yield of apple juice than if only water is added. This will be because enzymes speed up reactions. The pectinase will degrade the soluble pectin in the pulp which will in turn make the juices flow more freely resulting in a greater yield of apple juice in a set time period. Water does not act so fast on the pectin and so a small yield will be expected in the same time period. ...read more.

Middle

The juice from the apple pieces were then filtered using coffee filter papers in funnels placed in measuring cylinders. The volume of juice obtained was recorded from both lots of apple pulp at 5 minute intervals. Results: Time Taken (mins) Amount yielded Water/Pectinase (ml) 4.5 0 10 5.3 0 11 Conclusion: From the results it is possible to see what a difference the pectinase enzyme makes. In 5.3 mins the beaker that had had pectinase added produced 11ml of juice whereas the beaker with only water produced none. This experiment therefore shows that the enzyme pectinase does speed up the breaking down of soluble pectin allowing the juices to flow more freely, which in turn results in a greater yield of apple juice. ...read more.

Conclusion

This meant that an adequate amount of results could not be obtained due to time pressure. However, these problems do not completely invalidate the results. Because although there will have been differences in volume and surface area they will have been very small, and therefore could not have explained why the beaker with apple and water in it did not produce any juice in 5.3 mins and the one with pectinase in it produced 11ml. Therefore ways to have improved the accuracy of this experiment would have been to cut up the apple into measured cubes and then place exactly the same amount of cubes into each beaker. This would give the same surface area and volume in each beaker. Using a measuring cylinder with smaller grading would have also given more results and so a greater accuracy. Tim Dowdeswell Biology Mr Shawcross ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our GCSE Green Plants as Organisms section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related GCSE Green Plants as Organisms essays

  1. Peer reviewed

    Osmosis in potato and apple

    3 star(s)

    Also the concentration of the salt solution is measured when making the dilutions. In my preliminary experiment, I used 4 concentrations of solution; 0.00M, 0.25M, 0.50M 1M. This would not give me a reliable and precise conclusion therefore I will use a more varied range of concentrations.

  2. Commercial peat extraction

    They extract peat on a vast scale ruining the landscape, disrupting the ecosystem and changing the amount of water that is held in the ground. (The water table.) Gardeners bed their plants in peat, as they believe it is the best type of soil for planting their plants.

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work