AP Biology Lab 5: Cellular Respiration

Mr. Anderson guides students through an AP biology lab on cellular respiration, focusing on measuring respiration rates using a respirometer. The lab involves using worms and peas to observe oxygen consumption and carbon dioxide production. Key steps include glycolysis, the Krebs cycle, and the electron transport chain. The experiment uses potassium hydroxide to absorb CO2, allowing for accurate measurement of oxygen consumption. Data analysis reveals that germinating peas have the highest respiration rate, followed by worms and non-germinating peas.

What is the primary purpose of cellular respiration in eukaryotic cells?

• To form carbon dioxide

• To create oxygen

• To generate ATP

• To produce glucose

Which of the following organisms are used in the lab to measure respiration rates?

• Birds and mammals

• Fish and algae

• Worms and peas

• Bacteria and fungi

What is the role of potassium hydroxide in the respirometer setup?

• To provide nutrients

• To absorb oxygen

• To convert carbon dioxide into a solid

• To maintain temperature

Why are glass beads used in the respirometer experiment?

• To increase the rate of respiration

• To serve as a control for temperature fluctuations

• To absorb carbon dioxide

• To provide a source of oxygen

Which type of peas showed the highest rate of respiration in the experiment?

• Non-germinating peas

• Neither type of peas respired

• Germinating peas

• Both types of peas showed the same rate

What is the significance of the slope of the line in the respiration rate graph?

• It reflects the growth rate of the organism

• It indicates the amount of carbon dioxide produced

• It shows the rate of oxygen consumption

• It measures the temperature change

How can non-germinating peas be activated to perform cellular respiration?

• By freezing them

• By soaking them in water

• By exposing them to sunlight

• By drying them further