Cellular Respiration Term paper

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Introduction:

The purpose of this lab is to observe the rate of cellular respiration in a given organism by

observing the amount of oxygen gas taken in and the amount of carbon dioxide expelled by the

peas. The oxygen will be measured at 2 different temperatures and the carbon dioxide amount

will be determined by stochiometry after it has reacted with potassium hydroxide to form water

and potassium carbonate.

Lab Objectives:

-calculate the rate of cellular respiration from the obtained data.

-observe how cellular respiration works.

-use a chemical raection in oreder to find out the amount of initial reactant.

Hypotheses:

H0= The germinating peas will have the greatest respiration rate.

H1= The dry peas and beads will have the second highest respiration rate.

H2= The test tube with beads alone will have the lowest cellular respiration rate.

Materials List:

All materials are stated on lab sheet.

Procedure:

1. Obtain the volume of 25 germinating peas using the water displacement method. Dry

the peas. Also, set up the water baths, one at room temperature and the other at 10

degrees celsius.

2. Again using the water displacement method, place 25 dry peas in the water, and add

beads until the total displacement of the germinating seeds is reached. Dry the peas.

3. Once again use the water displacement method tp attain the number of beads that

would be needed to displace the same amount of water as the 25 germinating peas

displaced.

4. Repeat 1-3 with different peas. Set all these peas aside for later.

5. Assemble 6 respirometers. Take 6 vials and put a small swab of cotton in the bottom

of each. Saturate the cotton with 15%KOH. Dry the inside of the respirator vials.

Place a dry...

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