Cellular Respiration and Experimental Design

Mr. Andersen guides viewers through AP Biology Lab 5, focusing on cellular respiration. The lab uses a respirometer to measure the rate of respiration by observing oxygen consumption in worms and peas. The experiment involves setting up a respirometer with potassium hydroxide to absorb carbon dioxide, allowing for accurate measurement of oxygen use. The lab compares respiration rates of germinating peas, non-germinating peas, and worms, highlighting the higher rate in germinating peas. The video provides a detailed explanation of the experiment setup, procedure, and data analysis.

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

• To generate ATP

• To produce glucose

• To release oxygen

• To create carbon dioxide

Which of the following is NOT a stage of cellular respiration?

• Electron transport chain

• Photosynthesis

• Krebs cycle

• Glycolysis

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

• To maintain temperature

• To provide nutrients to peas

• To convert carbon dioxide into a solid

• To absorb oxygen

Why are glass beads used in the experiment?

• To act as a control for temperature fluctuations

• To absorb excess water

• To increase the rate of respiration

• To provide a source of carbon dioxide

What is the purpose of using non-germinating peas in the experiment?

• To measure the effect of light on respiration

• To increase the temperature of the setup

• To compare respiration rates with germinating peas

• To provide a source of oxygen

How is the rate of respiration determined in this experiment?

• By measuring the amount of glucose consumed

• By observing the color change in the respirometer

• By measuring the rate at which the air bubble moves

• By counting the number of peas

Which sample showed the highest rate of respiration in the experiment?

• Non-germinating peas

• Germinating peas

• Glass beads

• Worms

What happens to the carbon dioxide produced during the experiment?

• It is converted into a solid by potassium hydroxide

• It is used to produce more oxygen

• It is absorbed by the peas

• It escapes into the air

Why is it important to account for temperature changes in the experiment?

• Temperature changes can reduce the amount of oxygen

• Temperature changes can increase the number of peas

• Temperature changes can alter the color of the respirometer

• Temperature changes can affect the rate of respiration

What would likely happen if the non-germinating peas were soaked in water?

• They would produce more carbon dioxide

• They would stop respiration completely

• They would start to germinate and increase respiration

• They would decrease the temperature of the setup