A test tube was placed over the open end of the pipette then inverted. To investigate the effect of temperature on the rate of respiration in a suspension of yeast Saccharomyces cerevisiae. The delay in the reaction may also have been the build up of pressure to dislodge the water in the measuring cylinder and replace it with CO2 and this means that there was a gas trapped in the delivery tube for a certain period of time. We will write a custom sample essay on The respiration of yeast in different sugar substrates specifically for you. In addition, yeast must also use a second enzyme called maltase to break the glycosidic bond in between the two-disaccharide monomers. Rate of Respiration in Yeast Aim:

The products of the respiration of yeast are CO2 and ethanol, where the CO2 is collected in the experiment. The same procedure as above will be used for the making of the maltose solution. When measured accurately, it will be added to the 50cm3 of water in the beaker and stirred until it is fully mixed. You can see this result as the red circled one in my results table. In the experiment, the sugar type will be altered as I am trying to see what effect a monosaccharide and disaccharide would have on the production of CO2 by yeast cells, and to compare the sets of date produced. The results in the experiment coincided with the results of the yeast respiration lab.

The Effect Of Temperature On Anaerobic Respiration In Yeast

How to cite this page Choose cite format: As yeast, a tespiration organism is involved, there must be acceptable treatment of this organism. However glucose only requires the zymase enzyme to be broken down into ethanol and CO2, maltose.

anaerobic respiration of yeast coursework

Sucrose, maltose, lactose, all with the general formula C12H22O If the person allergic to the substance makes contact with the yeast, the affected body part should be washed immediately with cold water. Another mixture was made with yeast and agave syrup. In the laboratory, it is possible to hydrolyse disaccharides by heating in solution with acids.


Some people may be allergic to this substance, so to minimise the anaeroibc, the person concerned should avoid skin contact. The yeast solution will be a mixture of cm3 of distilled water, which will be measured using the beaker. Some variables in my experiment need to be controlled to produce reliable results.

The sugar solution will be a mixture of 50cm3 of distilled water with 1g of the chosen sugar. The cylinder will be held in place by using a clamp stand. If you contact us after hours, we’ll get back to you in 24 hours or less. This could and probably is due to the lack of quality apparatus. The reaction above is known as fermentation.

Anaerobic Respiration Of Yeast Coursework

We will write a custom sample essay on The Effect of Temperature on the Rate of Yeast Respiration specifically for you. These risks can be avoided by carrying one glass object at a time, and by taking care in the usage of these glass containers.

Temperature is a factor on cellular respiration in yeast because as the temperature increases it reaches an optimal temperature to produced the most energy and waste. If the gradients from, the line of best fit, anaerboic the average of volumes of CO2 collected with glucose and maltose, are analysed we will see interesting but expected results.

The level of the liquid was recorded every five minutes until no more reading could be read. This was because the solution was still acclimatising to the environment and conditions before starting.


The level of the liquid was recorded approximately even three to four minutes until no more reading could be read. This is further evidence that in this enzyme catalysed fermentation reaction, the variables were held constant precisely, due to the steady rate of CO2 produced in the reactions.

The Effect Of Temperature On Anaerobic Respiration In Yeast – GCSE Science – Marked by

This shows that a change in pH could affect the rate of respiration and production of CO2 by the yeast cells. Sorry, but copying text is not allowed on this site. Yeast and sugar were added to distilled water and mixed thoroughly to activate the yeast.

Your Answer is very helpful for Us Thank you a lot! Monosaccharides contain carbon, hydrogen and oxygen, in the ration 1: Leave your email and we will send anaerobicc an example after 24 hours The first variable, which I will touch upon, is the pH of the mixture. Improvements such more apparatus provided, like conical flasks, to aid in repeats tests.

The tube was placed in a warm water bath. This can be justified by the positive correlations in the graphs of both sugars.

anaerobic respiration of yeast coursework

The results in the experiment coincided with the results of the yeast respiration lab. They do almost everything in a cell. Metadata uti logistics case study Juice using mono and water and research task making wine.

anaerobic respiration of yeast coursework