1. How Cells Harvest Chemical Energy
Chapter 6
How Cells Harvest Chemical Energy

2. Concept Check- Get whiteboard & marker
Concept Check- Get whiteboard & marker
Some prokaryotic and all eukaryotic cells use oxygen to harvest energy from food molecules? In what form is that energy available to power cell work?
Heat and light.
Glucose molecules.
Fat molecules.
ATP molecules.
Answer: 4

3. Answer
Some prokaryotic and all eukaryotic cells use oxygen to harvest energy from food molecules? In what form is that energy available to power cell work?
ATP molecules.

4. Concept Check
Fat molecules store 9 Kcal per gram. There are about 454 grams in a pound of fat so that means that one pound of fat stores about 4,000 Kcal of energy. Based on the chart of energy consumption, which of the following would “burn off” a pound of fat, assuming your normal activities consumed calories equal to the rate of your calorie intake?
Running 7 miles
Swimming 2 miles
Walking 27 miles
Running about 40 miles
Answer: 4

5. Answer
Fat molecules store 9 Kcal per gram. There are about 454 grams in a pound of fat so that means that one pound of fat stores about 4,000 Kcal of energy. Based on the chart of energy consumption, which of the following would “burn off” a pound of fat, assuming your normal activities consumed calories equal to the rate of your calorie intake?
Running about 40 miles

6. Concept Check
The figure above represents an overview of the different processes of cellular respiration. Which of the following correctly identifies the different processes?
1. Glycolysis; 2. Electron transport chain; 3. Krebs cycle
1. Glycolysis; 2. Krebs cycle; 3. Electron transport chain
1. Krebs cycle; 2. Electron transport chain; 3. Glycolysis
1. Electron transport chain; 2. Glycolysis; 3. Krebs cycle
Answer: 2

7. Answer
The figure above represents an overview of the different processes of cellular respiration. Which of the following correctly identifies the different processes?
1. Glycolysis; 2. Krebs cycle; 3. Electron transport chain

8. Concept Check
The figure above represents an overview of the different entry pathways to cellular respiration when different macromolecules are digested for energy production. Why are none of the digestive products entering the electron transport chain, directly?
The electron transport chain is too deeply embedded in the mitochondria.
The electron transport chain only receives electrons carried by reduced electron carrier molecules such as NADH.
The electron transport chain only receives electrons carried by oxidized electron carrier molecules such as NAD+.
The electron transport chain does not produce ATP.
Answer: 2

9. Answer
The figure above represents an overview of the different entry pathways to cellular respiration when different macromolecules are digested for energy production. Why are none of the digestive products entering the electron transport chain, directly?
The electron transport chain only receives electrons carried by reduced electron carrier molecules such as NADH.

10. Interpreting Data
This graph illustrates the free energy relative to oxygen of the electron transport chain. The solid blue circles are electron carrier molecules and the light blue ovals represent protein complexes. From an energy standpoint are theses reactions endergonic or exergonic?
Endergonic
Exergonic
Some are exergonic and others are endergonic.
There is not enough information.
Answer: 2

11. Answer
This graph illustrates the free energy relative to oxygen of the electron transport chain. The solid blue circles are electron carrier molecules and the light blue ovals represent protein complexes. From an energy standpoint are theses reactions endergonic or exergonic?
Exergonic

12. Interpreting Data
What would happen to the flow of electrons if oxygen were not present?
The flow of electrons would continue but at a slower rate.
The flow would cease and ATP production would stop.
The presence of oxygen would have no effect.
Answer: 2

13. Answer
What would happen to the flow of electrons if oxygen were not present?
The flow would cease and ATP production would stop.

14. Interpreting Data
Cyanide binds strongly with the last electron carrier in the chain. How would this affect the flow of electrons?
The flow of electrons would continue but at a slower rate.
The flow would cease and ATP production would stop.
The presence of cyanide would have no effect. ?
Answer: 2

15. Answer
Cyanide binds strongly with the last electron carrier in the chain. How would this affect the flow of electrons?
The flow would cease and ATP production would stop. ?

16. ____________ is the anaerobic harvest of food energy.
Chapter 6 $200 Question
____________ is the anaerobic harvest of food energy.
a. Electron transport
b. Cellular respiration
c. Photosynthesis
d. Fermentation
ANSWER

17. ____________ is the anaerobic harvest of food energy.
Chapter 6 $200 Answer
____________ is the anaerobic harvest of food energy.
a. Electron transport
b. Cellular respiration
c. Photosynthesis
d. Fermentation

18. Chapter 2 $200 Question
Which of the following is commonly added to table salt to prevent the formation of goiters?
a. Calcium
b. Iodine
c. Sodium
d. Fluoride
ANSWER

19. Chapter 2 $200 Answer
Which of the following is commonly added to table salt to prevent the formation of goiters?
a. Calcium
b. Iodine
c. Sodium
d. Fluoride

20. Where in the cell does glycolysis occur?
Chapter 6 $300 Question
Where in the cell does glycolysis occur?
a. outside the mitochondria
b. in the endoplasmic reticulum
c. in the fluid of the mitochondria
d. on the outer mitochondrial membrane
ANSWER

21. Where in the cell does glycolysis occur?
Chapter 6 $300 Answer
Where in the cell does glycolysis occur?
a. outside the mitochondria
b. in the endoplasmic reticulum
c. in the fluid of the mitochondria
d. on the outer mitochondrial membrane

23. Chapter 6 $500 Question
What must pyruvic acid be converted to before it can enter the citric acid cycle?
a. acetyl CoA
b. lactic acid
c. ethyl alcohol
d. NADH
ANSWER

24. Chapter 6 $500 Answer
What must pyruvic acid be converted to before it can enter the citric acid cycle?
a. acetyl CoA
b. lactic acid
c. ethyl alcohol
d. NADH

25. The final electron acceptor of aerobic respiration is ________.
Chapter 6 $400 Question
The final electron acceptor of aerobic respiration is ________.
a. ATP
b. oxygen
c. carbon dioxide
d. lactic acid
ANSWER

26. The final electron acceptor of aerobic respiration is ________.
Chapter 6 $400 Answer
The final electron acceptor of aerobic respiration is ________.
a. ATP
b. oxygen
c. carbon dioxide
d. lactic acid

27. Average number soft drinks consumed daily
Biology and Society
Average number soft drinks consumed daily
Age
6-11 4 7 11 15
12-19 6 5
Obesity is a serious problem in the United States. This problem is growing the fastest in the under 30 age group. Some link this obesity to fatty fast food and others link it to the increased consumption of fructose sweetened soft drinks. Do you think that today’s students consume drink more soft drinks than they should?
Disagree Agree
Strongly A B C D E Strongly

28. Strongly A B C D E Strongly
Biology and Society
There is some preliminary evidence that appears to indicate that a diet that barely provides enough calories for maintenance could extend your lifespan. This is called a calorie restricted diet. Would you consider this type of diet to increase your potential life span?
Disagree Agree
Strongly A B C D E Strongly

29. Strongly A B C D E Strongly
Biology and Society
Do you think that your diet is primarily a healthy diet?
Disagree Agree
Strongly A B C D E Strongly

30. BMI = [Weight in Pounds/ (Height in Inches)2] x 703
Biology and Society
One quick indicator of possible obesity is the Body Mass Index. Here is the formula for the body mass index:
BMI = [Weight in Pounds/ (Height in Inches)2] x 703
Calculate your BMI and enter where you fit in the following table—remember it is anonymous.
BMI
Below 18.5
30.0 and above
Weight Status
A. underweight
B Normal
C. Overweight
D Obese