ONLINE lab 4 report template (BIOL 1152)

Name: Lab 4 Report – Cellular Respiration Exercise 4.1 Effect of carbohydrate type on anaerobic cellular respiration by yeast Table 4.1 Volume of carbon dioxide (ml) produced by different carbohydrates following 30 minutes of fermentation by yeast. (2) Solution Solution Glucose Sucrose Starch Water Replicates 1 2 3 1 2 3 1 2 3 1 2 3 Initial bubble height (cm) 0.4 0.4 0.3 0.3 0.4 0.4 0.3 0.3 0.3 0.4 0.5 0.3 Final bubble height (cm) 8.4 4.5 7.8 4.3 4.9 4.7 0.3 0.3 0.3 0.3 0.5 0.3 Change in bubble height (cm) 8.0 4.1 7.5 4.0 7.5 7.3 0 0.1 0 -0.1 0 0 Volume of CO 2 produced (ml ) 14. 13 7.2 4 13. 24 7.0 6 7.9 4 7.5 9 0 0.1 7 0 - 0.1 7 0 0 Mean CO 2 production (ml) 11.53 7.53 0.05 0.00 GRAPH (comparing the mean volume of CO 2 produced by yeast fermenting different carbohydrates) Be sure to choose the most appropriate type of graph based on your variable types. Include error bars. *Delete this box and insert your graph here. Include a descriptive figure title below your graph. (4) Q1. What was your null hypothesis? Do you accept or reject it? (2) The type of carbohydrate will have no effect on how much CO 2 is produced.  I reject my null hypothesis.

Name: Q2. State your results (which carbohydrate solutions produced the most/least CO 2 ?) (1) Q3. Explain your results. (2) Note: If the data collected produced unexplainable/unexpected results, state this in your report. Then explain what SHOULD have happened. Also provide some thoughts on what you think may have gone wrong in the experiment (potential causes of error). Q4. What gas is responsible for holes in baked bread? (1) Q5. If the fermentation of sugar by yeast produces alcohol (ie. in wine and beer), then why does the this not result in alcoholic bread? (1) Q6. Under what circumstances might anaerobic respiration take place in the human body and why? In which parts of the body does this happen? (2) Exercise 4.2 Measuring aerobic cellular respiration by soybeans GRAPH (comparing o xygen consumption in germinating and non-germinating soybeans) *Delete this box and insert your graph (from simulation) here. Include a descriptive figure title below your graph. (3) Q7. State the results. (1) Q8. Explain the results. (2) Q9. What is the purpose of KOH in this experiment? (1) Q10. Explain why the dye moved toward the respirometer while the soybeans were performing aerobic respiration. (2) Q11. What was the purpose of adding glass beads to some tubes in the experiment? (1)

Name: Q13. Do you accept or reject your null hypothesis? Q14. State your results (1) Q15. Explain your results. (2) Note: If the data you collected produced unexplainable/unexpected results, state this in your report. Then explain what SHOULD have happened. Also provide some thoughts on what you think may have gone wrong in your experiment (potential causes of error). Q16. What ideas do you have for experiments that could build on this experiment and/or make this experiment better? (2).