• Join over 1.2 million students every month
• Accelerate your learning by 29%
• Unlimited access from just £6.99 per month
Page
1. 1
1
2. 2
2
3. 3
3

# To investigate the effect of temperature on the rate of anaerobic respiration in yeast.

Extracts from this document...

Introduction

Biology Coursework: Planning Aim: To investigate the effect of temperature on the rate of anaerobic respiration in yeast. Prediction: I predict that the yeast will respire faster up to the temperature of 50�C. This is because for yeast to anaerobic respire it uses enzymes and enzymes are denatured past 50�C. Because of this I think that the yeast will respire fastest at 50�C and once past that temperature it will start to slow down and once all of the enzymes are denatured. I think that the fastest rate of respiration will be 50�C because every 10�C rise in temperature doubles the rate of respiration, but after the maximum temperature every 10�C rise the rate of reaction will decrease by the same amount it increased. Method: To do this experiment I will be using the following pieces of equipment, a boiling tube, a delivery tube, a water bath, a thermometer an solution of 0.1g of yeast to 20cm3 of water, sugar, cooking oil, a timer, a beaker, a measuring cylinder and hot water. ...read more.

Middle

The bubbles will be carbon dioxide given off by the yeast. To make sure that I don't have any bubbles from the initial aerobic respiration that happened when the yeast was mixed with the sugar before the oil was added. I will test this three times so I can see if had any anomalous results. I will record my results on my results table. I will be using two variables in this investigation: 1) The variable temperatures to see which is the optimum for the yeast 2) The amount of sugar- to see if it makes a difference to the rate of reaction The temperature is needed to be a variable so that I can investigate if the rate of reaction doubles in a rise of 10�C. the variable of the sugar means I will be able to find out if more bubble are made at a certain temperature with more sugar. ...read more.

Conclusion

Another way for this to be made fair would be to use an electronically controlled water bath. Another factor that needs to be made fair is the time the yeast is given to adjust to the temperture. I have decided to give the yeast 10 minutes to adjust. I will count the time using a stop-watch. Temp �C Sugar (g) 1 min 2 mins 3 mins 4 mins 5 mins 6 mins 7 mins 8 mins 9 mins 10 mins 20 2 1 20 2 2 20 2 3 20 4 1 20 4 2 20 4 3 30 2 1 30 2 2 30 2 3 30 4 1 30 4 2 30 4 3 40 2 1 40 2 2 40 2 3 40 4 1 40 4 2 40 4 3 50 2 1 50 2 2 50 2 3 50 4 1 50 4 2 50 4 3 60 2 1 60 2 2 60 2 3 60 4 1 60 4 2 60 4 3 ...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

# Related GCSE Green Plants as Organisms essays

1. ## Plan for Anaerobic Respiration in Yeast

4 star(s)

into a test tube. I then put the bung with the delivery tube into the top of the test tube, shook the test tube and put the other end of the test tube into a beaker full of lime water.

2. ## Investigating the effect of concentration of sugar on the respiration rate of yeast

After heating the yeast to the right temperature we leave the test tube with the yeast in the water bath so the temperature stays constant through the test. � We then measure the amount of sugar needed and we prepare a beaker with water.

1. ## What is the effect on the rate of respiration of yeast cells with glucose ...

> The mixture of glucose and yeast must be stirred until dissolved using clean spatulas. The stirring should be done in one direction only. > The rubber bung at the end of the delivery tube must be fitted tightly at the top of the conical flask so that no gas leaks.

2. ## Experiment to investigate the effect of temperature on respiration in yeast.

The quantities that I will change will be the glucose and yeast because then I can find out which is the formula that will produce the most bubbles. I also could of changed the time, but I didn't because I ran out of time unfortunately, this would of told me

1. ## The effect temperature has on the rate of anaerobic respiration in yeast.

The fat shows up red on an indicator before lipase has broken it down. When it has been broken down it turned yellow. We put Lipase and animal fat in a tube, which was in a water bath so we could control the temperature.

2. ## An Investigation into the Effect of Temperature on the Rate of Respiration in Yeast.

The experiments I have used are: Conical flask, yeast, thermometer, test tube, clock, water, water bath, 10cm� measuring cylinder, glucose and rubber tubing. Yeast Conical flask Rubber tubing Clock Thermometer Water 10cm� measuring cylinder Water bath Test tube Glucose Method/Diagram 1.

1. ## Investigating The Fermentation of Yeast

the amount of bubbles given off by both of the tubes slowed down. I think this may have been caused by the drop in the water's temperature as time went on as the heat was radiated away, or the yeast may have used up the glucose and slowed the fermenting right down.

2. ## Ashland Oil Inc.: Trouble at Floreffe

As a part of the oil industry, Ashland had the responsibility to ensure that the tanker with oil was properly insured against problems. Three things that came under scrutiny in the preliminary investigation were: * Age of the oil tanker * Testing that had been done before filling it *

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