Cell Respiration Lab # 5

Overview Dormant seeds are used A seed contains a plant embryo and a food supply surrounded by a seed coat When germination occurs the rate of cellular respiration greatly increases.

In this lab Measure the oxygen consumption during germination Measure the change in gas volume in respirometers Germinating seeds Nongerminating seeds Measure the rate of respiration of peas at different temperatures.

Introduction Aeorbic cellular respiration is the oxidation of glucose. Oxygen is required for this energy-releasing process to occur. C6G12O6 + 6O2 6CO2 + 6 H2O + 686 kilocalories of energy/mole of glucose oxidized.

Measuring Cellular Respiration 3 Ways 1. Consumption of O2 How many moles of O2 are consumed? 2. Production of CO2 How many moles of CO2 are produced? 3. Release of energy during cellular respiration.

The General Gas Law PV = nRT P = the pressure of the gas, V = the volume of the gas, n = the number of molecules of gas, R = the gas constant (its value is fixed), T = the temperature of the gas (in degrees K)

Gas law implies If T and P are constant, then V is proportional to n. If T and V are constant, then P is proportional to