Cellular Respiration

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

-