You placed the tubes containing each reaction into the apparati shown at the left. Glucose is converted into ATP, alcohol and carbon dioxide gas. A small amount of CO2 was produced over the course of the experiment.
The tube containing the most yeast will produce the most CO2 and will have the fastest rate of alcoholic fermentation.
Here, CO2 displaced the water in the tube. Yeast are responsible for alcoholic fermentation of glucose. Typical results showed that the tube containing no yeast produced no CO2.
In the experiment you performed in lab, you measured the amount of CO2 produced in alcoholic fermentation under different conditions. In the lab experiment, you added water, glucose or dextroseand either 0, 1, or 3 ml of yeast to the reaction tubes. If it is temperature for example, maybe the experimental group would have a higher or lower temperature than normal and the control group would be at room temperature.
The greater the amount of water displaced, the greater the amount of CO2 produced by fermentation. Alcohol and carbon dioxide are also produced in this reaction.
This apparatus provided an oxygen free chamber in which alcoholic fermentation occurred. Additionally, the tubing attached to the reaction chamber routed the CO2 produced by fermentation to the collection tube. The amount of sugar left in the test tubes could indicate a slower or faster fermentation reaction.
The dependent variable would be the rate of fermentation which could be observed by the amount of carbon dioxide produced.
After you set up each apparatus, you marked the water level in the collection tube. Contact Us Alcoholic fermentation uses enzymes to convert glucose into ATP which the cell can use to do work in the absence of oxygen.
What does the difference in CO2 levels in the tube containing 1ml of yeast vs. You can have an experimental set up with the variable you are testing--the independent variable. Alcoholic fermentation is the most efficient process for producing ATP?
There are several things you can do with yeast. What were the dependent and independent variables? The control group would not get the independent or manipulated variable. Note the bubble of CO2 that is emerging from the tubing in the photograph.
At 5 minute intervals, you then measured in centimeters the distance between the water line and the mark of the original water line. Why does bread rise? You can even do an experiment about how yeast make bread dough rise under various experimental conditions--perhaps using different types of flour.
You can test the affect of temperature, or ph on the rate of fermentation. What are two variables that can be manipulated to change the rate of alcoholic fermentation? Balloons attached to the test tubes housing the yeast and sugar solution can capture the carbon dioxide. Use your imagination and follow the scientific method for doing your experiment and subsequent lab report.Lab protocols for new IB guide Thanks.
I don't have an issue with the lab requirements time wise, it is just that I don't want to spend time on something if we are needing to focus in other areas. IB Biology IA: Osmosis - Free download as PDF File .pdf), Text File .txt) or read online for free.
The effect of increasing sucrose concentration on the mass of potato chips Biology was an HL subject for me.5/5(). 30 investigation ideas for Biology IA This page is a simple list of ideas for investigations.
It may be useful for students who are lost for an idea, or teachers who are looking for something to inspire a. Ms. Maczuzak's IB Biology Site Exam. Osmosis & Diffsuion IB Biology Lab Report Rubric With Attached Example IA on Plasmolysis in Potatoes With Comments.
Resources for Data Coming Out of Sarka Park. Stretch Day IB BIO/ESS Lab Report Outline. Uncertainty of a Spectronic WRITING A GOOD BIOLOGY LAB REPORT. In the experiment you performed in lab, you measured the amount of CO 2 produced in alcoholic fermentation under different conditions.
In the lab experiment, you added water, glucose (or dextrose), and either 0, 1, or 3 ml of yeast to the reaction tubes. IB Science Lab Report Template Lab reports make up 24% of your final Biology & Chemistry grade towards your IB Diploma.
This is a template to help prepare you for completing these lab reports.Download