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

The Effect of Temperature on Yeast Enzymes

Extracts from this document...

Introduction

The Effect of Temperature on Yeast Enzymes Aim: The aim of this experiment is to find out the effect of different temperatures on yeast enzymes using a water bath, thermometer, etc. Background: Yeast is a type of fungi or mushroom. It is a single-celled micro-organism and is used in making bread rise as well as alcohol, or ethanol, making. Another method of using yeast to make alcohol is fermentation. The chemical follows: Glucose-------> 2 ethanol + 2 carbon dioxide + heat C6H12O6 (glucose) �2C2H5OH + 2CO2 The yeast enzymes are packed with enzymes called zymase. Yeast reproduces asexually. During asexual reproduction, a new bud grows out of the parent yeast when the condition is right, then, after the bud reaches an adult size, it separates from the parent yeast. ...read more.

Middle

3. Place a beaker full of water inside the water bath so that the beaker reaches the temperature of the bath (20 degrees C). 4. Measure 0.9 gm of glucose. According to my preliminary experiment, I believe this is the appropriate amount to use for this experiment as it is not too excessive and it's not too little either. Also, I found it out to be the optimum amount. 5. I will place the glucose and yeast in the same boiling tube and add water to it. 6. I will also put in a suitable amount of water into it, not too much, but not too little. ...read more.

Conclusion

Fair Testing: To keep the test fair, I will keep the level of water in the bath, cylinder, and boiling tube the same. I will also keep the amount of glucose and yeast the same, as this will be fairer. Hypothesis: I predict that the temperature that the enzyme will work best at 40 degrees C as this is the closest temperature to our body, and enzymes work in our body. This is the optimum temperature for the enzymes to work well at. Other temperatures will not work best because if the temperature is too high (80 degrees C), or if it is too low (0 degrees C) then the enzymes will denature because the heat is likely to kill them. ?? ?? ?? ?? ...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. What is the effect on the rate of respiration of yeast cells with glucose ...

    The gradient of this tangent was calculated using the following calculation: (change in y � change in x) Initial rates of reaction Temperature at which the experiment was carried out / �C Rate of reaction /cm�min�� 30 40 50 60 0 The results that were recorded after 10 minutes at 60�C proved to be very significant.

  2. Investigating The Fermentation of Yeast

    Here is a diagram of the experiment: Here are the results of experiment two in a table: Number of bubbles given off /min. TIME IN MINUTES TEST TUBE ONE TEST TUBE TWO 1 0 0 2 0 0 3 0 0 4 0 0 5 0 0 6 0 0

  1. What is GM foods?

    These actions causes a few large companies dominate the world food market. Controversy The safety of GM Food has been a major source of controversy with many believing that it may have possible side effects. Organically grown food is generally perceived as being safer than GM food.

  2. Investigating respiration in aged yeast

    The results are shown in the following table: Yeast Volume of CO2 (cm3) Time (min:sec) Rate of CO2 volume per minute (cm3/minute) to 1dp A 10 53:00 0.188 ~ 0.2 B 10 26:35 0.376 ~ 0.4 C 10 17:07 0.584 ~ 0.6 D 10 21:15 0.470 ~ 0.5 E 10

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