The Effect Of Glucose Concentration On Anaerobic Respiration In Yeast

859 words - 3 pages

The Effect of Glucose Concentration on Anaerobic Respiration in YeastIntroduction:Yeast, also known as a saccharomyces cerevisiae, is single celled eukaryotic cells that are in the kingdom fungi and are unicellular organisms which normally reproduce asexually by budding at a very high rate. Scientists quite often decide to work with yeast because of its features fast growing rate and the fact that yeast's DNA can be easily manipulated. Some types of yeast can be found naturally on plant or in the soil. Also it is worthwhile mentioning that yeast feeds on sugar very well, and so that I decided to use glucose.My independent variable will be the concentration of glucose solution. To make sure that that my test will be fair, I will make sure that the water temperature, volume of yeast and glucose and the timings will be as constant as possible. The only thing that I'm going to change is the concentration of the glucose, so I will be able to see whether the concentration of glucose will have an effect on the respiration of yeast or not. I also will also make sure that while conducting an experiment, I will keep the flasks absolutely clean all the time. This will help to avoid the chance of bacteria building up, and so the competition over the glucose will be avoided.The mass added and the intervals of adding must be controlled, because it might affect the overall outcome. In order to get good fermentation environment for the yeast, the incubator will be kept around 30c.My hypothesis for this experiment is that the greater the concentration of glucose will be added, the faster the rate of respiration will be. This is because more glucose added to the yeast will mean more glucose to break down, therefore producing ethanol and carbon dioxide. Also to support my hypothesis I would mention that, more concentration of glucose will result in the more heat energy produced and so more molecules will move around and collide.Anaerobic Respiration equation: glucose → ethanol + carbon dioxide (+ energy released)Aerobic Respiration equation: glucose + oxygen → carbon dioxide + water (+ energy)VariablesIndependent Variable:
Concentration of Glucose

Measured by measuring cylinders/pipettes, as a percentage to the water solution
Concentration: 10%,15%,20%,25% and 30% to volume of distilled water

Controlled Variables

Measured by measuring cylinder
Volume: 200ml


Same distilled water is used
pH: 7

Mass of Yeast

Measured by a top pan balance
Grams: 1.5g of dried yeast
Yeast is left to settle for 5 minutes after it will be mixed with glucose and the amount of gas has to be recorded from the start.


Measured by a thermometer
C: Varies throughout the day, but each yeast solutions...

Find Another Essay On The Effect of Glucose Concentration on Anaerobic Respiration in Yeast

The Effect of Glucose on Brain Performance

726 words - 3 pages memory, problem solving, and reflex? Introduction: Based on Iowa State University Website about “Role of Carbohydrates,” brain primarily uses glucose, a monosaccharide, as its energy source, and a lack of glucose can cause weakness, fatigue, and low blood glucose. As a result, nutritionists like Erica Giovinazzo, MS, RD, suggest combining carbohydrate in breakfast composition to improve brain performance during the day. In this study, glucose is

Effect Of Temp On Yeast Essay

5195 words - 21 pages ; Enzymes; An increase in the amount of yeast cells leads to an increase of zymase enzymes and this means an increase in the amount of molecules produced by the enzymes. The more enzyme molecules there are the more successful collisions between particles and so the faster the rate of reaction. Enzymes work as biological catalysts, reducing the amount of energy required for successful collisions."¢ The concentration of glucose and yeast

A comparison of the respiration of yeast in different sugar substrates

6583 words - 26 pages cells, and therefore any change in temperature for glucose or maltose would alter the rate of CO2 production.The independent variable will be the type of sugar, which is the variable I intend on changing. 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.Fair Test: A fair test will be

An investigation of the glucose concentration of the cell sap in potato cells

4213 words - 17 pages An investigation of the glucose concentration of the cell sap in potato cells In this experiment I intend to investigate the effects of osmosis on potato cells. Specifically, I intend to use my knowledge of osmosis to investigate the glucose concentration of the cell sap in potato cells. Osmosis is a method by which water levels on either side of a semi permeable membrane may balance themselves. It occurs between regions of high water

The Effect Of Substrate on Enzyme concentration

2790 words - 11 pages (for e.g.). This means that more reactions between enzyme and substrate molecules take place in a second and therefore oxygen is evolved faster.So at higher concentrations of enzyme solution, the oxygen is given off more rapidly because there are more enzyme molecules working on substrate molecules in a second.Graph 2This graph shows the relationship between the concentration of yeast and the rate of reaction. Rate of reaction being the speed at

Investigating the concentration of Glucose inside Cell sap in potatoes Through Osmosis

1813 words - 7 pages from an area of high concetration to an area of low concentration. The cell membranes are permeable to water, and so if the glucose concentration inside the cell is more concentrated than the solution it's placed in, water molecules will pass through the cell wall to the solution, causing the potato to gain weight.For this experiment I will be using small cylinder shaped pieces of potato, 5cm long, and cut with a cork borer to ensure the same

Effect of pH Buffer on Yeast Reaction

1840 words - 7 pages Shardul Bansal BioChem 27/11/14Effect of pH on Yeast Rate of ReactionAimI have chosen to investigate pH levels because I find it intriguing that people only use water to make bread dough. However, the optimum pH for a yeast reaction to occur is slightly acidic. Could it be that people all around the world have been using the wrong liquid to make their bread dough? In this investigation, I want to put the theory to the test, and to see if bakers

Effect of Concentration on Osmosis

2617 words - 10 pages Effect of Concentration on Osmosis Aim To find out how the concentration of sucrose solution affects the mass of the potato chip left in the solution for one day. Prediction I predict that when the sucrose concentration is low the potato chip will gain mass. This is because there will be a higher sucrose concentration in the potato chip so water will go into the potato from the solution. I predict that when there is a high

Study on the effect of Glucose on Doxorubicin-Human hemoglobin interaction

1449 words - 6 pages simultaneously.Thus,in the simultaneous presence of Glc and DOX, Hb structure undergoes changes differently. This study also proved that the effect of Glc on interaction between Hb and DOX is dose-dependent and since the concentration of Glc in diabetic persons has a significant increase than normal persons,so the interaction of Hb and DOX and consequently the possible toxic effects of DOX maybe differ in normal and diabetic persons. 1

Investigate the Effect of Varying Solution Concentration on Osmosis in a Potato Chip

4330 words - 17 pages Investigate the Effect of Varying Solution Concentration on Osmosis in a Potato Chip Prediction A definition of osmosis is: 'the movement of water molecules from an area of high water concentration to a low water concentration across a semi-permeable membrane' (Oxforddictionary 2000). In a high concentration of water the amount of solute (e.g. sugar) is low. These solutions are usually known as a dilute or weak solution. But in a low

The Effect of Water and Glucose Solution During Moderate Intensity Exercise on Post-Exercise Apetite

1963 words - 8 pages Purpose: This test is to investigate the effect of water and glucose solution, during moderate intensity exercise on post-exercise appetite. Methods: A male participate (Age: 24yr; BMI: 20.5kg/m2; VO2max: 57.7ml/kg/min) completed one preliminary VO2max test first. After that, complete two main trials separately with different solution. Participant had to cycling at 55% VO2max for 30 minutes and resting 30 minutes. During the whole experimental

Similar Essays

The Effect Of Temperature On Anaerobic Respiration Of Yeast

1642 words - 7 pages The Effect of Temperature on Anaerobic Respiration of Yeast We wanted to find the effect of temperature on anaerobic respiration of yeast. We investigated how a mixture of yeast, water, sugar, and flour were affected. Diagram ======= Apparatus ========= 1g of yeast 0.5g of sugar 10g of flour 6 measuring cylinders - to put the sachets in and the 20cm3 of water Measuring

The Effect Of Different Sugar Sources On Yeast Respiration

726 words - 3 pages The purpose of this investigation is to test the effect of different sugar sources on yeast respiration. Yeasts are unicellular organisms belonging to the fungi kingdom and Eukarya Domain. Yeast are heterotrophs which gain its energy from enzymes that break down carbohydrates into alcohol and CO2. It can also derive energy from simple sugars such as fructose and glucose, which can be found mostly in groups and reproduce asexually (occasionally

The Effect Of Sugar Substitutes On Yeast Respiration

1531 words - 6 pages , fermentation is the process by which yeast, in the absence of O2 (oxygen), converts glucose into CO2 and alcohol. It is the form of anaerobic respiration, respiration without O2, which yeasts carry out in order to get ATP, adenosine triphosphate (energy) from food. Yeasts are exposed to glucose and they convert it into alcohol, CO2, and energy. In order for the fermentation process to work, there must be no O2 present, an organic compound of some sort

Rate Of Respiration In Yeast Essay

2513 words - 10 pages unsaturated this will allow the glucose to mix easily with the yeast therefore making it respire more frequently. The sucrose sugar however having larger molecules will find it harder to mix in with the yeast; this will make the rate of respiration in the sucrose much slower as it is not as efficient as the glucose. Yeast requires enzymes to digest the food on which the yeast is living. The enzymes digest the food the