Effects of Temperature on Cell Respiration
Product Number: SB49180
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Sorry, this product is no longer available. Grades 9-college.
Cell respiration can be viewed as a series of enzyme catalyzed reactions in which carbohydrates, proteins, and fats are broken down to carbon dioxide and water with the release of energy. During the process, hydrogen is removed from the fuel molecules and oxygen is consumed. With this background information, students measure oxygen consumption and hydrogen liberation in germinating barley at different temperatures. The program provides eight calibrated respirometers for measurement of oxygen consumption and the chemicals required to perform a graphic dye reduction assay. The exercise introduces students to a fundamental biological process and provides insight into seed structure and germination. Set up is for 16 students working in pairs, requires a one-hour long lab period. Includes complete instructions, 10 large transfer pipets, 10 small transfer pipets, eight calibrated respirometers (includes stoppers with attached calibration tubes, 25 ml glass tubes and eight small 1.5 ml tubes), bag of corn seeds, 150 g of barley seeds, 7.5 g of potassium hydroxide, and 0.1 g of tetrazolium.