Photosynthesis and Respiration problems
- 1. In the initial step of photosynthesis, sunlight energizes the electron pair of
Options- A. adenosine triphosphate (ATP)
- B. chlorophyll pigments
- C. water
- D. carbon dioxide Discuss
Correct Answer: chlorophyll pigments
- 2. Antenna complexes, electron transport chains, and carbon fixation are all found in
Options- A. animal cells
- B. bacterial cells
- C. plant cells
- D. association with the reactions of the citric acid cycle Discuss
Correct Answer: plant cells
- 3. Which of the following statements about energy metabolism is false?
Options- A. The energy that powers living systems ultimately comes from the sun
- B. All animals in some way rely on plants for their energy
- C. Plants provide the water and CO2 that animals need to carry out respiration
- D. All eukaryotic organisms carry out respiration in the presence of O2 Discuss
Correct Answer: Plants provide the water and CO2 that animals need to carry out respiration
- 4. What do NAD+, NADP+, and FAD+ all have in common?
Options- A. They are reduced
- B. They have a full complement of electrons
- C. They are oxidized
- D. They are what is used during carbon fixation in photosynthesis Discuss
Correct Answer: They are oxidized
- 5. In oxygenic photosynthesis, the electron donor is
Options- A. water
- B. oxygen
- C. NADH
- D. NADPH Discuss
Correct Answer: water
- 6. The cytochrome c oxidase complex
Options- A. accepts electrons from cyt c
- B. donates four electrons to O2
- C. pumps protons out of the matrix space
- D. all of these Discuss
Correct Answer: all of these
- 7. What do coenzyme A, CO2, oxaloacetate, and FADH2 all have in common?
Options- A. They are all components or products of the citric acid cycle
- B. They are part of the dark reactions of photosynthesis
- C. They are part of the reactions of lactic acid fermentation
- D. They are all elements of oxidative phosphorylation Discuss
Correct Answer: They are all components or products of the citric acid cycle
- 8. In algae, photosynthesis takes place in
Options- A. choloroplasts
- B. cell membrane
- C. mitochondria
- D. none of the above Discuss
Correct Answer: choloroplasts
- 9. If the oxygen is labeled in CO2 and provide this CO2 to a plant, where it is expected to find this labeled oxygen after the plant had undergone photosynthesis?
Options- A. In the water used
- B. In the NADPH
- C. In the carbohydrate produced
- D. In the oxygen given off by the plant Discuss
Correct Answer: In the carbohydrate produced
- 10. The followings are the products of the light reactions of photosynthesis except
Options- A. ATP
- B. oxygen
- C. NADPH
- D. glucose Discuss
Correct Answer: glucose
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