Name(s): __________________________________________ Date:__________ Class Period:_____
ONLINE
LAB: Cellular Respiration
Directions: Perform this lab by using this link http://www.phschool.com/science/biology_place/labbench/lab5/intro.html
and this document.
Read the online lab and record your data.
1. In this lab activity:
a) You will observe __________________________________________________________________
b) You will investigate
________________________________________________________________
2. Write the equation for cellular
respiration:
3. What are the three ways in which you can
measure the rate of cellular respiration?
4. Sketch a respirometer and label its
important features.
5. As the organism inside the respirometer
consumes oxygen, what happens to the water? _________________________
6. What happens to the CO2 that the organism
produces? ____________________________
7. Experimental Setup (View the graphic)
a) fill out the table
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Vial 1 |
Vial 2 |
Vial 3 |
Vial 4 |
Vial 5 |
Vial 6 |
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Contents |
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Temperature |
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b) How do you ensure that each vial has an
equal volume?
c) What is the purpose of the vial with only
glass beads?
8. Analyzing Results
a) What is the equation to determine the rate
of respiration?
b) What is X _______________ What is Y
_______________
9. Read the respirometers and determine the
rate of respiration. Show your calculations
10. Analysis - use the graph to answer the questions below
a) Describe the relationship between
temperature and consumption of oxygen.
b) Calculate the rate of oxygen consumption
for germinating corn at 12 degrees. (Show calculations)
c) Based on the graph, would you conclude
that non germinating seeds respire?
Self
Quiz
11. Honors section:
A cricket is placed in a respirometer and
data is taken at three temperatures. The following table shows the data
collected.
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Temperatures |
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Time (min) |
10 degrees |
18 degrees |
25 degrees |
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0 |
0.0 |
0.0 |
0.0 |
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5 |
0.25 |
0.6 |
0.9 |
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10 |
0.5 |
0.9 |
1.4 |
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15 |
0.7 |
1.2 |
1.8 |
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20 |
0.9 |
1.6 |
2.4 |
a ) Graph the data.
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b) Determine the rate of respiration for each
of the three temperatures. (Show work)
c) Write a paragraph stating your conclusions