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Ch9 Respiration Review
Multiple Choice
Choose the letter of the best answer.
1. Heterotrophs are also called
a. producers.
b. autotrophs.
c. consumers.
d. "self-feeders."
2. What are the waste products of cellular respiration?
a. carbon dioxide and water
b. ATP and ADP
c. carbon dioxide and oxygen
d. energy and glucose
3. What metabolic stage is part of both cellular respiration and fermentation?
a. electron transport
b. glycolysis
c. Krebs cycle
d. ATP synthase action
4. What is the net gain of ATP molecules produced directly by glycolysis?
a. 2
b. 4
c. 34
d. 38
5. Electron transport occurs in the
a. cytosplasm.
b. matrix of the mitochondria.
c. outer membrane of the mitochondria.
d. inner membrane of the mitochondria.
6. Which molecule accepts electrons from the final carrier in the electron transport chain?
a. NAD
b. pyruvic acid
c. oxygen
d. carbon
7. Which of the following molecules is not involved in fermentation?
a. glucose
b. pyruvic acid
d. oxygen
Short Answer
8. Explain why it can be said that most of life on Earth is solar-powered.
9. Describe what happens to the chemical energy in food that is not converted to useful cellular
10. How could you measure the calorie content of a peanut in the laboratory?
11. Describe how energy is stored in an ATP molecule.
12. What are the three main types of cellular work? Give an example of each.
13. Summarize the steps of glycolysis.
14. Which stage of cellular respiration uses oxygen directly to extract chemical energy from
organic compounds? Explain the steps in this stage.
15. Compare and contrast fermentation that occurs in human muscle cells and in yeast cells.
Visualizing Concepts
16. Fill in the missing spaces in this fermentation concept map.
17. Use the diagram below to answer the questions.
a. What are the chemical reactants in photosynthesis? What are the chemical products?
b. What do the double arrows in each reaction indicate?
c. How are photosynthesis and cellular respiration related? How are they different?
18. The data table below lists the kilocalories (kcal) needed for various activities. Refer to the
table to answer the questions that follow.
a. How many hours would a 67.5-kg person have to walk to use up the energy contained in a
cheeseburger containing 430 kcal?
b. How far would this person have walked if he were walking 3 km per hour?
c. What form of exercise would use up the cheeseburger's calories in the shortest amount of time?
Explain your answer.
19. Red blood cells do not contain mitochondria. Which stage or stages of sugar breakdown can
take place in these cells? Explain your answer.
20. How is the process by which your body extracts energy from food similar to how a car's
engine extracts energy from fuel? How is it different?
21. Explain the following statement: Heterotrophs depend on autotrophs for energy.
22. What's Wrong With These Statements?
Briefly explain why each statement is inaccurate or misleading.
a. Plants carry out photosynthesis and animals carry out cellular respiration.
b. ATP traps most of the energy released from food during the Krebs cycle.
c. While sprinting, your muscle cells stop cellular respiration and switch to fermentation to
produce ATP.