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110%20Exam%20#3%20F09%20Red%20Key-1 - Exam III Biology 110...

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Exam III Biology 110 – Fall 2009 Dr. David H. Bos INSTRUCTIONS:   Fill in your BIOL 110 code number and  NOT  your PUID in the section of  the scantron sheet marked: Student Identification Number.  The use of calculators, cell phones or  other electronic devices is not allowed during the exam. Read each question carefully and choose  the best answer. There are  34  questions on this exam.  There is only one correct answer for each  question. Do not fill in multiple answers, as they will be marked incorrect. Turn in only the  answer sheet when you are done. You may keep the exam. Take your time, think and good luck! 1. What controls the direction of transfer of electrons between electron carriers? a. Size b. Affinity for electrons c. Imbalance in the number of electrons and protons d. Number of electron orbitals e. pH 2. Which photosynthetic component is responsible for capturing light energy? a. Proton pumps b. Electron transport chains c. RuBP d. The stroma e. Photosystems 3. In Biological organisms, the transfer of electrons in redox reactions is usually accompanied by the transfer of: a. Carbon b. Oxygen c. Hydrogen d. Phosphate groups e. Water 4. Where do photosynthetic light reactions take place? a. Stroma b. Cytoplasm c. Thylakoid space d. Thylakoid membrane e. Vacuoles 5. Which of the following are the products of the light reactions? 1. ATP 2. Glucose 3. G3P 4. 3-PGA 1
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5. NADPH a. b. c. 2 d. e. 6. What is the product of carbon fixation? a. G3P b. Glucose c. RuBP d. ATP e. 3-PGA 7. Which steps in the Calvin Cycle require ATP hydrolysis? a. Reduction of Carbons b. Regeneration c. Carbon fixation d. e. 8. Electrons that enter the entire photosynthetic process end their journey how? a. By oxidizing water b. By reducing carbon-based sugars c. By reducing NADP to NADPH d. By reducing water e. By oxidizing RuBP 9. At what point during the light reactions do electrons have the most energy? a. In NADPH b. In the B6-f complex c. In the reaction center of photosystem I  d. In the reaction center of photosystem II e. As part of the electron donor (water) 10. After the first two steps of the Calvin cycle are completed once, how many G3P molecules are produced?
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110%20Exam%20#3%20F09%20Red%20Key-1 - Exam III Biology 110...

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