AP Biology Respiration Free Response Questions
AP Biology Cellular Respiration Free Response Questions
Answer the following Free Response Questions from past AP Exams. Submit your answers to Moodle when you are finished.
1. The results below are measurements of cumulative oxygen consumption by germinating and dry seeds. Gas volume measurements were corrected for changes in temperature and pressure.
|Cumulative Oxygen Consumed (mL) |
|Time (minutes) |0 |10 |20 |30 |40 |
|22° C Germinating Seeds |0.0 |8.8 |16.0 |23.7 |32..0 |
|Dry Seeds |0.0 |0.2 |0.1 |0.0 |0.1 |
|10° C Germinating Seeds |0.0 |2.9 |6.2 |9.4 |12.5 |
|Dry Seeds |0.0 |0.0 |0.2 |0.1 |0.2 |
a. Creat a graph that plots the results for the germinating seeds at 22° C and at 10° C.
b. Calculate the rate of oxygen consumption for the germinating seeds at 22° C, using the time interval between 10 and 20 minutes. (show your work)
c. Account for the differences in oxygen consumption observed between:
i. germinating seeds at 22° C and at 10° C
ii. germinating seeds and dry seeds
d. Design an experiment that would test the effect of temperature on a grasshpper. Give the following information from that experiment:
- hypothesis
- description of the apparatus you would use to measure respiration rate
- other materials you would use for measurement and their functions
- control group
- independent variable
- dependent variable
- variables needed to be controlled
- step by step experimental method
- data table used to collect results
- graph used to report results
- number of trials needed
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