Experiment 14 Investigating Environmental Science through Inquiry 14 - 1 S PRELIMINARY ACTIVITY FOR Cell Respiration Cell respiration refers to the process of converting the chemical energy of organic molecules into a form immediately usable by organisms. Glucose may be oxidized completely if sufficient oxygen is available by the following equation: C 6 H 12 O 6 + 6O 2 (g) → 6 H 2 O + 6 CO 2 (g) + energy All organisms, including plants and animals, oxidize glucose for energy. Often, this energy is used to convert ADP and phosphate into ATP. It is known that peas undergo cell respiration during germination. PROCEDURE 1. If CO 2 Gas Sensor your sensor has a switch, set it to the low range setting. Connect the sensor to the data- collection interface. 2. Place 10–15 germinating peas in the respiration chamber that ships with the CO 2 Gas Sensor. Insert the CO 2 Gas Sensor in the neck of the respiration chamber. Start the data-collection program. Wait 90 seconds for the sensor to warm up and begin collecting data. 3. After data are collected, use the linear regression function to determine the rate of respiration. After completing the Preliminary Activity, you will first use reference sources to find out more about germination and cell respiration before you choose and investigate a researchable question. Some topics to consider in your reference search are: • germination • cell respiration • carbohydrates • glucose QUESTIONS 1. Do the results of this experiment verify that germinating peas respire? How do you know? 2. What do you expect would happen to the rate of respiration if you repeated this experiment with non-germinating peas? C O G a s S e n s o r 2 Evaluation copy

PRELIMINARY ACTIVITY FOR Cell · PDF fileCell respiration refers to the process of converting the chemical energy of organic molecules into a form ... Science through Inquiry 3

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Page 1: PRELIMINARY ACTIVITY FOR Cell · PDF fileCell respiration refers to the process of converting the chemical energy of organic molecules into a form ... Science through Inquiry 3

Experiment

Investigating Environmental Science through Inquiry 14 - 1 S

PRELIMINARY ACTIVITY FOR

Cell Respiration

Cell respiration refers to the process of converting the chemical energy of organic molecules into a form immediately usable by organisms. Glucose may be oxidized completely if sufficient oxygen is available by the following equation:

C6H12O6 + 6O2(g) → 6 H2O + 6 CO2(g) + energy

All organisms, including plants and animals, oxidize glucose for energy. Often, this energy is used to convert ADP and phosphate into ATP. It is known that peas undergo cell respiration during germination.

PROCEDURE 1. If CO2 Gas Sensor your sensor has a switch, set it to

the low range setting. Connect the sensor to the data-collection interface.

2. Place 10–15 germinating peas in the respiration chamber that ships with the CO2 Gas Sensor. Insert the CO2 Gas Sensor in the neck of the respiration chamber. Start the data-collection program. Wait 90 seconds for the sensor to warm up and begin collecting data.

3. After data are collected, use the linear regression function to determine the rate of respiration.

After completing the Preliminary Activity, you will first use reference sources to find out more about germination and cell respiration before you choose and investigate a researchable question. Some topics to consider in your reference search are:

• germination • cell respiration

• carbohydrates • glucose

QUESTIONS 1. Do the results of this experiment verify that germinating peas respire? How do you know?

2. What do you expect would happen to the rate of respiration if you repeated this experiment with non-germinating peas?

s Se

nsor

Evalua

tion co

Page 2: PRELIMINARY ACTIVITY FOR Cell · PDF fileCell respiration refers to the process of converting the chemical energy of organic molecules into a form ... Science through Inquiry 3

Experiment 14

14 - 2 S Investigating Environmental Science through Inquiry

3. Why do germinating peas undergo cell respiration?

4. Use a concept map or other organizing tool to list your prior knowledge of cell respiration.

5. List at least one researchable question for this experiment.

Page 3: PRELIMINARY ACTIVITY FOR Cell · PDF fileCell respiration refers to the process of converting the chemical energy of organic molecules into a form ... Science through Inquiry 3

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THIS IS AN EVALUATION COPY OF THE VERNIER STUDENT LAB. This copy does not include:

Safety information Essential instructor background information Directions for preparing solutions Important tips for successfully doing these labs

The complete Investigating Environmental Science through Inquiry lab manual includes 34 inquiry-based labs and essential teacher information. The full lab book is available for purchase at: http://www.vernier.com/cmat/esi.html

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