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Submitted by lifeisbtchin on May 6, 2008
Category: Miscellaneous
Words: 492 | Pages: 2
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Cellular Respiration
I/ Introduction
- Cellular respiration is the cellular process whereby carbon-containing compounds are broken down through the series of reactions that result in the gradual release of energy.
- Cellular respiration consumes oxygen (O2) and produces (CO2). Because oxygen is required so cellular respiration is aerobic.
- Include metabolic pathways: glycolysis, transition reaction, the Krebs cycle, electron transport system and oxidative phosphorylation.
- Overall reaction:
C6H12O6 + 6O2 => 6H2O + 6 CO2 + energy
- Measure cellular respiration rate by using CO2 Gas Sensor to track the change in CO2 concentration that is occurring in seeds of all types.
Part 1: Germinating and non-germinating seeds
a.) Hypothesis: Germinating seeds will have higher cellular respiration rate than non-germinating seeds.
b.) Dependent variable is whether the seeds are germinating or not.
c.) Independent variable is the change in CO2 concentration.
d.) Control variables: temperature, mass of seeds used, and volume of chamber.
Part 2: Germinating seeds in cold water
Hypothesis: Low temperature will make cellular respiration rate smaller.
Part 3: Germinating seeds at different days of germination
Hypothesis: seeds that germinating longer will have higher cellular respiration.
III/ Results:
Part 1: At 210C, 10.8 grams of each type of seeds were used. The rate of respiration of
- Germinating seed is 92.58 ppm/min
- Non- germinating seed is -0.974 ppm/min. (I guess)
Part 2: At 20C, 16.96 grams of germinating seeds were used.
- Rate of respiration is 27.06 ppm/min
Part 3: At 210C, 10.8 grams of each type of seeds were used.
The rate of respiration of germinating seed at
- First day is 92.58 ppm/min
- Three days is 68.40 ppm/min
- Five days is 76.25 ppm/min
...
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