BIO 100
STUDY GUIDE CHAPTER 7, Photosynthesis Using Light to Make Food (Modules 7.1 - 7.6,11,13)

1. Based upon the newest research as shown on page 110, write the overall equation for photosynthesis.

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2. TRUE/FALSE

A. Plants require carbon dioxide,water, and sunlight to make glucose.

B. Burning fossil fuels releases carbon dioxide that was removed from the atmosphere millions of years ago.

C. Burning wood contribute more to acid rain than burning fossil fuel

D. The food that people eat can be traced back to photosynthesis.

E. Willow trees contain more fuel and power than most native trees.

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A.

B.

C.

D.

E.

3 What term or terms is /are used to indicate organisms that make organic food molecules from inorganic raw materials?
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4. What are photosynthetic autotrophs?
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5. Autotrophs are self-feeders, but they are not self-sufficient. Explain this statement.
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6. Based on the method of obtaining food,(as show on page 108),which the following, which one does not belong with the others ? Kelp, purple bacteria, fungi?
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7. Complete the following analogy Chloroplast is to__________as
________________to cellular respiration
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8. Among the following descriptions, which would be features of producers?
A. They make the biosphere's food supply.
B. They are autotrophs.
C. They maintain themselves without eating.
D. They make organic molecules from simple raw materials.
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9. What specific organs found in most green plants and in what structures inside the organs in most green plants would one expect to find chloroplasts? Be Careful!!!

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A.

B.

10. Through which structures does gas exchange occur in higher green plants? What gases are involved and what is the direction of the exchange?
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11. What is being described: the chloroplast compartment that is filled with a thick fluid?
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12. What parts of a chloroplast does the following phrase denote: the third compartment of a chloroplast; where disk like membranous sacs arranged in stacks are located?
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13. Distinguish between the following terms: thylakoids and grana?

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14. Give the specific location of the chlorophyll molecules inside of chloroplasts.
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15. What structures are contained within the stroma? (CAUTION: the answer is identical to #14).

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16. Name the molecule which serves as both a reactant and a product of photosynthesis.
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17. If you add radioactive carbon dioxide (both atoms are labeled) to a plant growing in light, what products would you expect to find radioactive C and radioactive 0?
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18. If you add water of a photosynthesizing plants that contains both radioactive H and radioactive O, in which of the products of photosynthesis will the radioactive H and O show up?
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19. What is the source of the oxygen that is released into the air as a product of photosynthesis?

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20. TRUE/FALSE

A. ATP is only produced during cellular respiration. ATP is not produced during photosynthesis.

B. Photosynthesis is ultimately powered by light energy; cellular respiration, by the chemical energy of fuel molecules such as glucose.

C. Photosynthesis consumesCO₂ ; Cellular respiration consumes O₂.

D. Photosynthesis produces O₂ ; Cellular respiration produces CO₂ .

E. The primary electron carrier molecule in photosynthesis is NADPH; the primary electron carrier in cellular respiration is NADH.

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A.

B.

C.

D.

21. What is the source of energy that is absorbed by electrons during photosynthesis?

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22. Explain the following statement A water molecule is oxidized, during photosynthesis.
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23. Where does the light reactions occur within the chloroplasts? Where are sugars produced within the chloroplasts?

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A.

B.

25. When is a C02 molecule said to be reduced?
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26. Which of the following statements is/are true regarding the role of redox reactions in photosynthesis?

A. Photosynthesis involves only reductions while cellular respiration involves only oxidation.

B. Photosynthesis involvers only oxidation while cellular respiration involves only reduction.

C. In photosynthesis, carbon dioxide is oxidized to form sugar while in cellular respiration, sugar is reduced to form carbon dioxide.

D. In photosynthesis, carbon dioxide is reduced to form sugar while in cellular respiration, sugar is oxidized to form carbon dioxide.

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A.

B.

C.

D.

27. Name the three products of the light reactions.
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28 . What chemical event occurs during carbon dioxide fixation? Note: Closely linked to number 27.
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29 . Identify by name, the products of the light reactions that are used in the dark reactions, or Calvin cycle.

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30. Describe the role played by each product produced in the light reactions.

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A.

B.

C.

31. Name the KEY product of the dark reaction, or Calvin cycle.

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32. What do the reactions of the Calvin cycle use and then recycles for use in the light reactions?

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33. Select Only those statements that are true about photosynthesis and cellular respiration.
A. Both green plants and animals carry out the process of cellular respiration.
B. Green plants contain both chloroplasts and mitochondria; animals contain only
mitochondria.

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A.

B.

34. Use two of the following terms to describe sunlight: kinetic, potential, mechanical, electromagnetic.
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35. Why are most plants green?
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36. Among the visible spectrum, which wavelength of light, would you expect to be least absorbed by chlorophyll-a?
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37. What is the role of chlorophyll-b in photosynthesis?
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38 . What are the pigments that are primarily responsible for the color of leaves during the fall of the year?
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39. Explain why a poison that inhibits an enzyme of the Calvin cycle will also inhibit the light reactions.

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40. What is the ultimate source of all the food we eat and the oxygen we breathe?

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41. What use is made of sugars that are synthesized by green plants?

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42. True/False: Green plants have chloroplasts but not mitochondria.

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43. Describe what is meant by the greenhouse "effect".

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44. What are three sources of the greenhouse "effect"? NOTE: NOT EXAMPLES OF GASES!!!!

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45. Give three ways that the greenhouse "effects" can be reduced,.

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