Guided Reading - Cell Respiration and Metabolism III
1. Glycolysis converts glucose into two ______________ molecules. 
A. glycogen
B. lactic acid
C. acetyl CoA
D. pyruvic acid
2. Beta-oxidation of an 18 carbon fatty acid will yield _____ acetyl CoA molecules. 
A. 9
B. 6
C. 18
D. None of these choices are correct.
3. To form lactic acid from pyruvic acid it is necessary to have 
4. During the conversion of one pyruvic acid to acetyl coenzyme A, ______________ molecule(s) of carbon dioxide is/are produced. 
A. no
B. one
C. two
D. four
5. The final electron acceptor in aerobic cell respiration is 
A. water.
B. oxygen.
C. carbon dioxide.
6. ______________ cells normally produce ATP exclusively by anaerobic respiration metabolism. 
A. Red blood
B. White blood
C. Skin
D. Nerve
7. Energy lost during the process of aerobic cell respiration is given off as 
A. carbon dioxide.
B. water.
C. oxygen.
D. metabolic heat.

8. What is the purpose of white fat? 
A. thermogenesis
B. provide blood-borne energy carriers
C. provide an ATP source for newborns.
D. All of the choices are correct.
9. The primary site of ketone body synthesis is 
A. the lung.
B. the kidney.
C. the liver.
D. adipose tissue.
10. The majority of energy within the body is stored as triglycerides. 
True    False
11. Glucose 6-phosphate can diffuse out of a cell. 
True    False
12. In glycolysis, glucose is converted to glycogen. 
True    False
13. What percentage of energy released by aerobic respiration of glucose is captured by ATP? 
A. 25-30%
B. 30-34%
C. 38-40%
D. 42-46%
14. The hydrolysis of triglycerides to fatty acids and glycerol is called 
A. lipogenesis.
B. lipolysis.
C. beta-oxidation.
D. deamination.
15. Most of the glucose secreted by the liver during fasting is due to 
A. glycogenolysis.
B. gluconeogenesis.
C. lipolysis.
D. deamination.
16. In the formation of acetic acid from pyruvic acid, the oxygen in the carbon dioxide comes from oxygen gas. 
True    False
17. The importance of the Krebs cycle in energy production is the formation of significant amounts of 
B. lactic acid.
D. carbon dioxide.

18. What theory explains the ability of the electron transport system to pump protons between the inner and outer mitochondrial membranes? 
A. tricarboxylic acid theory
B. chemiosmotic theory
C. phosphorylation theory
D. proton pump theory
19. Each turn of the Krebs cycle directly produces ______________ molecule(s) of ATP. 
A. one
B. two
C. four
D. no
20. What type of enzyme is used to catalyze the reaction that converts glucose 6-phosphate to fructose 6-phosphate? 
A. phosphatase
B. hydrogenase
C. reductase
D. isomerase
21. What type of tissue is especially dependent on adequate plasma glucose levels? 
A. skeletal muscle
B. cardiac muscle
C. nervous
D. liver
22. Beta-oxidation produces acetyl CoA molecules from fatty acids. 
True    False
23. The electron transport system is a series of _________ reactions. 
A. composition-decomposition
B. dehydration synthesis-hydrolysis
C. oxidation-reduction
D. reversible
24. Each pair of hydrogens generated in glycolysis are used to 
A. reduce 2 molecules of NAD.
B. oxidize 2 molecules of NAD.
C. reduce 2 molecules of FAD.
D. oxidize 2 molecules of FAD.
25. Which of the following is NOT a primary catabolic source of energy to produce ATP? 
A. fatty acids
B. cholesterol
C. amino acids
D. glucose