PDF Multiple Choice Review- Energy Processing

Multiple Choice Review- Energy Processing

1. Metabolism is considered to be the "total chemical reactions occurring within an organism". These chemical reactions may be linked into "pathways". Which of the following statements best characterizes anabolic and catabolic pathways? a. Anabolic pathways break down molecules while catabolic pathways synthesize molecules b. Anabolic pathways synthesize molecules while catabolic pathways break down molecules. c. Both pathways synthesize molecules but do so in different ways. d. Both pathways break down molecules but do so in different ways.

Two graphs are shown below. Use the graphs to answer questions 2 through 4.



2. Which of the following correctly describes the information shown in graph #1? a. This graph represents an endergonic reaction. b. This graph represents a reaction with high activation energy. c. This graph represents a catabolic pathway. d. This graph represents an anabolic pathway.

3. The graphs above represent pathways that can be coupled or linked. In which order would we link these pathways such that they can occur spontaneously? a. Reaction from graph 1 followed by the reaction from graph 2. b. Reaction from graph 2 followed by the reaction from graph 1. c. Reaction from graph 1 followed by another reaction from graph 1. d. Reaction from graph 2 followed by another reaction from graph 2.



PSI Biology

Energy Processing

4. Which of the reactions represented by the graphs above, will occur spontaneously? a. The reactions represented by graph 1. b. The reactions represented by graph 2. c. The reactions represented by both graph 1 and graph 2. d. Not enough information to determine.

5. Cells use energy produced from reactions to power cell processes. How does ATP function in this role? a. Energy is stored within ADP and released when the terminal phosphate is added. b. Energy is stored within ATP and released when the terminal phosphate bond is hydrolyzed. c. Energy is stored as H+ and released when attached to ATP. d. Energy is stored within ATP and released when a H+ is hydrolyzed.

6. Based upon the role of ATP within cells, what type of reactions are ATP hydrolysis and ADP phosphorylation? a. Both are endergonic reactions b. Both are exergonic reactions c. ATP hydrolysis is an endergonic reaction while ADP phosphorylation is an exergonic reaction. d. ATP hydrolysis is an exergonic reaction while ADP phosphorylation is an endergonic reaction.

7. There are different types of cellular respiration. Cells can be classified based on oxygen requirements of cellular respiration. Which of the following statements correctly identifies the oxygen requirements for two of these cell types? a. Obligate aerobes can survive in the presence or absence of oxygen while obligate anaerobes cannot survive in the presence of oxygen. b. Facultative aerobes can survive in the presence or absence of oxygen while obligate aerobes cannot survive in the presence of oxygen. c. Facultative anaerobes can survive in the presence or absence of oxygen while obligate anaerobes cannot survive in the presence of oxygen. d. Obligate anaerobes can survive in the presence or absence of oxygen while obligate aerobes cannot survive in the presence of oxygen.



PSI Biology

Energy Processing

The image below represents the steps of one of the processes of cellular respiration. Use this illustration to respond to questions 8 and 9.



8. Identify the process shown in the image above. a. photosystem 2 b. citric acid cycle c. electron transport chain d. glycolysis

9. How many net ATP are produced through the process shown in the image above? a. 2 b. 4 c. 6 d. 38

10. Pyruvate decarboxylation produces ATP as well as a. NADH, acetyl Co-A and CO2 b. Citric acid, NADH and O2 c. Pyruvate, NADH and CO2 d. FADH, NADH and O2

11. By the end of the Citric acid (Krebs) cycle, one molecule of glucose has produced ATP. However, the vast majority of the potential energy is stored in the form of a. ADP and FAD b. CO2 and NADH c. Pyruvate and NAD d. NADH and FADH



PSI Biology

Energy Processing

12. What is the role of ATP synthase in the electron transport chain? a. ATP synthase removes the hydrogen from water and attaches it to ADP to produce ATP. b. Protons travel through ATP synthase, resulting in the addition of phosphates to ADP molecules. c. Protons travel through ATP synthase, resulting in the addition of hydrogen to NAD and FAD molecules. d. ATP synthase removes a phosphate group from ATP to produce ADP, thereby releasing energy.

The illustration below represents a process that can be performed by certain types of cells. Use this illustration to respond to questions 13 and 14.

Lactic acid

Alcohol

1

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13. What is the process indicated by the number 1? a. Citric acid (Krebs) cycle b. Glycolysis c. Fermentation d. Electron transport chain

14. Under what conditions can the process, labeled 1 in the illustration above, occur? a. when oxygen is present b. when oxygen is absent c. when NAD is present d. when carbon dioxide is absent

15. The energy from ATP used by cells originates from: a. potential energy b. light energy c. dark energy d. kinetic energy



PSI Biology

Energy Processing

16. By approximately 2.0 BYA the process of photosynthesis had a catastrophic affect upon the organisms that had evolved up to this time. Which of the following best describes why? a. Organisms up to this time had evolved in the absence of oxygen. The process of photosynthesis caused an increase in oxygen and death for many obligate aerobes. b. Organisms up to this time had evolved in the presence of oxygen. The process of photosynthesis caused a decrease in oxygen and death for many obligate aerobes. c. Organisms up to this time had evolved in the presence carbon dioxide. The process of photosynthesis caused a decrease in carbon dioxide and death for many obligate anaerobes. d. Organisms up to this time had evolved in the absence of carbon dioxide. The process of photosynthesis caused an increase in carbon dioxide and death for many obligate aerobes.

17. The cyclic energy transport of photosynthesis was likely the first type of photosynthesis to originate. Which of the following statements best describes the result of cyclic energy transport? a. Glucose and ADP are produced as the result of cyclic energy transport. b. Glucose and ATP are produced as the result of cyclic energy transport. c. Light energy is converted into ATP. d. Light energy is converted into glucose.

18. Noncyclic energy transport consists of two major processes: a. Cyclic energy transport and the calvin cycle. b. One process that requires light and one process that must occur in the absence of light. c. One process that requires light and one process that can occur in the presence or absence of light. d. The lumen and stroma stages.

19. What is the order of the photosystems within the process of photosynthesis? a. Photosystem II is followed by photosystem I. b. Photosystem I is followed by photosystem II. c. Photosystem II is followed by photosystems I and III. d. The photosystems can function in any order as long as there is light.

20. Which of the following equations represents the reactants and products of

the Light Dependent Reactions of photosynthesis?

a. 2H2O + 2NADP- + 3ADP + 3P O2 + 2NADPH + 3 ATP

b. O2 + 2NADPH + 3 ATP

2H2O + 2NADP- + 3ADP + 3P

c. light energy + 6H2O + 6CO2

C6H12O6 + 6O2

d. C6H12O6 + 6O2

6H2O + 6CO2



PSI Biology

Energy Processing

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