Rate of Fermentation

Keywords: rate of fermentation of yeast

Cells obtain energy through a process called respiration. Yeast normally respires aerobically. Inside the absence of air, yeast provides out anaerobic respiration. Yeast carries out alcoholic beverages fermentation which is catalysed by the enzyme zymase to produces ethanol, carbon dioxide and energy. Ethanol is used in making wine beverage.

Alcohol fermentation formula:

Glucose Liquor + Carbon dioxide

C5H12O5 2C2H5OH + 2CO2

The rate of fermentation is influenced by several factors like temperatures, type of glucose solution, attentiveness of fungus and amount of glucose. To be able to measure the rate of fermentation, the rate of creation of skin tightening and is assessed in this experiment.


To investigate how level of yeast suspension may influence the speed of fermentation.


As the volume of yeast suspension system increases, the pace of fermentation also heightens.


Independent varying : Level of yeast suspension

Dependent changing : Rate of fermentation

Constant adjustable : Amount of glucose, kind of sugar solution, temperature, time considered for the speed of fermentation.

Materials & Equipment:

50-mL of measuring cylinder, 2-ml of graduated pipette, yeast suspension, glucose solution, 37oC tepid to warm water, burette, stopwatch, test pipe, delivery tube, and basin.


1) 20mL of glucose solution was put into the test tubes using a 50mL measuring cylinder.

2) 2mL of candida suspension was put into the solution in test tubes by using a 2mL graduated pipette.

3) The end of the test pipes were covered with the thumb and the test tubes were inverted several times to thoroughly blend the details of the test pipes.

4) The test pipes were covered with a stopper.

5) The delivery tube was attached, calculating cylinder was filled up with normal water and the apparatus was create so that gas produced will be gathered in the measuring cylinder. Two sets of apparatus were create where one of them serves as a control.

6) The test pipes were located in a beaker which is ѕ full with warm water at 370C to ensure a suitable environment.

7) The volume of gas stated in the measuring cylinder was discovered and documented every five minutes for a complete of 40 minutes.

8) The test was repeated by using 4mL of fungus suspension rather than 2mL of candida suspension.

9) A table was constructed to record enough time of measurements and the total volume of skin tightening and produced for both test. A graph was constructed.


Based on the graph, the curve for experiment which uses 4ml of fungus suspension system is steeper than the curve for test which uses 2ml of yeast suspension. We can conclude that as the quantity of yeast suspension system increases, the volume of skin tightening and produced also rises. When more level yeast suspension is used the reactant will increase causes the frequency of collision to be increase too. So, higher fruitful collision will happen and causes the merchandise which is skin tightening and to be released will increase. The results can be said correct as the readings are near each other in both experiments. However, the reading for the experiment which uses 4ml of fungus suspension system at minute of 35 and 40 is not precise as it includes quite huge difference. The graph does not have any scattered points which indicates that arbitrary errors aren't very significant for this experiment. Random mistake such as the temperature of water bath tub is not regular to 37C which may affect the effect obtained. Besides that, another possible arbitrary error is the shortcoming of real human to react fast when working with stopwatch. He might start devote some time or end the time slowly and gradually or quickly. So, it could affect the detail of the results. Advancements can be done by using an incubator as its drinking water bath tub which its temps won't drop or gain once it is set to 37C. The person with stopwatch must really quick to start out the stopwatch exactly following the delivery pipe is connected to the test pipe containing yeast suspension system and blood sugar solution. The accuracy and reliability can't be commented as the real value is not given in both experiments. However, based on the theory it holds true that when the quantity of yeast suspension system increases, the quantity of carbon dioxide produced also increases. Systematic errors like the burette might not be calibrated properly. Some of the carbon dioxide gas might dissolve in water and impacts the actual level of carbon dioxide gas produced. Therefore, improvements such as only use the burette which is properly calibrated and gas syringe is used to collect the exact amount of skin tightening and produced. It is important to use a lot of examples because a more reliable end result can be obtained and the effect of random problems will be reduced. So, the results obtained can be more precise. Repeating the experiment is important as it'll improve the validity of results.


As the quantity of yeast suspension increases, the speed of fermentation also increases. Hypothesis is accepted.

  • More than 7000 students trust us to do their work
  • 90% of customers place more than 5 orders with us
place an order

Latest posts

Read more informative topics on our blog
The Educational Curriculum INSIDE THE Philippines Education Essay
Education The educational curriculum in the Philippines is low in comparison to other countries. Other countries are able to find out more advanced...
The Ecotourism In Scotland Travel and leisure Essay
Tourism Hospitality and travel and leisure are very closely linked; every time a tourist comes to Scotland there are lots of restaurant and hotels to...
Corporate Social Responsibility: Targets and Concepts
Business Abstract Corporate Social Responsibility is a management principle whereby companies integrate social and environmental concerns in their...
A Personal Reflection AROUND THE ITM Information Technology Essay
Information Technology I have been in information technology industry for a long time. I have first-hand information technology experience especially in...
The Theory Of Mcdonaldization Commerce Essay
Commerce McDonaldization is the process where the concepts of the junk food industry have come to dominate an increasing variety of organizations in...
The Interpretation Of Life Quotes
Philosophy As you all know most of us are here in this planet for a while only and our life or being blessed as a individuals is a gift irrespective of...
The Sex Appeal In Advertising Mass media Essay
Media Through the years we have found a diversity advertising resources for offering products which were calling the attention of the costumers, to be...
Impacts of Tourism Deregulation and National Security
Marketing National security is definitely an issue going out with back to as early as when man started out arranging himself in contemporary society....
Homogeneous And Differentiated Product In Microeconomics Economics Essay
Economics The economic issue in this observation involves the concept of homogeneous and differentiated product in microeconomics According to Lindeman...
Check the price
for your assignment
we accept
  • Visa payment system
  • MasterCard payment system
  • Payoneer payment system
  • PayPal payment system
Money back
100% quality
Plagiarism free writing service