Cellular Respiration Lab Walkthrough

Mr. Anderson guides students through AP Biology Lab 5, focusing on cellular respiration. The lab uses a respirometer to measure the respiration rate of worms and peas by tracking oxygen consumption. The experiment involves setting up a respirometer with potassium hydroxide to absorb carbon dioxide, allowing for accurate measurement of oxygen use. Data is collected over time, and results are analyzed to compare respiration rates of germinating peas, non-germinating peas, and worms. The lab demonstrates the principles of cellular respiration and the importance of controls in scientific experiments.

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

• To create carbon dioxide

• To release oxygen

• To generate ATP

• To produce glucose

Which chemical is used in the respirometer to absorb carbon dioxide?

• Magnesium sulfate

• Potassium hydroxide

• Calcium carbonate

• Sodium chloride

What is the role of glass beads in the experiment?

• To act as a control for temperature fluctuations

• To measure oxygen consumption

• To provide nutrients for peas

• To absorb carbon dioxide

Which sample is expected to have the highest rate of respiration?

• Germinating peas

• Non-germinating peas

• Worms

• Glass beads

Why do germinating peas have a higher respiration rate compared to non-germinating peas?

• They contain more water

• They are actively growing and require more energy

• They are larger in size

• They are exposed to more light

What is the significance of the air bubble movement in the respirometer?

• It tracks the growth of peas

• It measures the temperature change

• It shows the rate of oxygen consumption

• It indicates the amount of carbon dioxide produced

How can the rate of respiration be graphically represented?

• As a pie chart of carbon dioxide levels

• As a bar graph of temperature changes

• As a linear graph of oxygen consumed over time

• As a histogram of oxygen levels