‘
Cell Respiration Virtual Review
The term cellular respiration refers to the biochemical
pathway by which cells release energy from the chemical
bonds of food molecules and provide that energy for the
essential processes of life. All living cells must carry out
cellular respiration. It can be aerobic respiration in the
presence of oxygen or anaerobic respiration. Prokaryotic
cells carry out cellular respiration within the cytoplasm or on
the inner surfaces of the cells. More emphasis here will be
placed on eukaryotic cells where the mitochondria are the
site of most of the reactions. The energy currency of these
cells is ATP, and one way to view the outcome of cellular
respiration is as a production process for ATP
Visit the following website:
http://www.phschool.com/science/biology_place/labbench/lab5/intro.html
Please answer the following questions in full and
complete sentences
1) Where does cell respiration take place?
2) What is the purpose of this experiment?
3) What is the chemical equation of cell respiration?

4) What are some processes in plants that require ATP?
5) Describe what is happening in the animation seen in
“Respiration at the Cellular Level” in your own words
6) What specimen will be examined in this experiment?
7) Describe the function and purpose of a respirometer in your
own words
8) What is the independent variable of the experiment?
9) What is the dependent variable of the experiment?
10) Why is it important that each of the vials have an equal volume?
11) What is an enzyme? What is the function of an enzyme?
12) What would be the rate of oxygen consumption if the
respirometer readings were as shown in the “Analysis of Results 1”
section?
13. Which of the following is a true statement based on the data?
a. The amount of oxygen consumed by germinating corn at 22°C is
approximately twice the amount of oxygen consumed by germinating
corn at 12°C.
b. The rate of oxygen consumption is the same in both germinating
and non-germinating corn during the initial time period from 0 to 5
minutes.
c. The rate of oxygen consumption in the germinating corn at 12°C at
10 minutes is 0.4 ml O2/minute.
d. The rate of oxygen consumption is higher for non-germinating corn
at 12°C than at 22°C.
e. If the experiment were run for 30 minutes, the rate of oxygen
consumption would decrease.
14. What is the rate of oxygen consumption in germinating corn at
12°C?
a. 0.08 ml/min
b. 0.04 ml/min
c. 0.8 ml/min
d. 0.8 ml/min
e. 1.00 ml/min
15. Which of the following conclusions is supported by the data?
a. The rate of respiration is higher in non-germinating seeds than in
germinating seeds.
b. Non-germinating peas are not alive, and show no difference in rate
of respiration at different temperatures.
c. The rate of respiration in the germinating seeds would have been
higher if the experiment were conducted in sunlight.
d. The rate of respiration increases as the temperature increases in
both germinating and non-germinating seeds.
e. The amount of oxygen consumed could be increased if pea seeds
were substituted for corn seeds.