Photosynthesis and Respiration problems
- 1. Carbon dioxide is reduced in
Options- A. noncyclic photophosphorylation
- B. the Calvin cycle
- C. the light reactions
- D. both light and dark reactions Discuss
Correct Answer: the Calvin cycle
- 2. In the Calvin cycle, carbon dioxide is fixed in a reaction with the
Options- A. ribulose diphosphate
- B. ribulose phosphate
- C. ribose tri phosphate
- D. 3-phosphoglyceric acid Discuss
Correct Answer: ribulose diphosphate
- 3. Which enzyme is involved in carbon-fixation reaction?
Options- A. NADP reductase
- B. Cytochrome reductase
- C. Ribulose bisphosphate carboxylase
- D. Glycerol kinase Discuss
Correct Answer: Ribulose bisphosphate carboxylase
- 4. The vast majority of the molecules that act as energy carriers to power cellular activities are made in
Options- A. the nucleus
- B. the Golgi apparatus
- C. the cytosol
- D. the mitochondria and chloroplasts Discuss
Correct Answer: the mitochondria and chloroplasts
- 5. Oxidative phosphorylation is to respiration as __________ is to photosynthesis
Options- A. carbon fixation
- B. electron transport chain
- C. light capture by chlorophyll
- D. reduction of NADPH Discuss
Correct Answer: electron transport chain
- 6. Where does the O2 come from that is essential for the proper functioning of oxidative phosphorylation?
Options- A. Fermentation
- B. Light reactions of photosynthesis
- C. Dark reactions of photosynthesis
- D. Carbon fixation Discuss
Correct Answer: Light reactions of photosynthesis
- 7. Electron transport systems play a vital role in
Options- A. Calvin cycle
- B. photorespiration
- C. light-dependent reactions
- D. all of these Discuss
Correct Answer: light-dependent reactions
- 8. Which of the following represents a correct ordering of the events that occur during the respiration of glucose in the absence of O2?
Options- A. Glycolysis; citric acid cycle; oxidative phosphorylation
- B. Glycolysis; oxidative phosphorylation; citric acid cycle
- C. Oxidative phosphorylation; citric acid cycle; glycolysis
- D. Glycolysis; fermentation Discuss
Correct Answer: Glycolysis; fermentation
- 9. Which of the following structures or processes are logically associated with chloroplasts?
Options- A. Plant cells
- B. Chlorophyll
- C. Thylakoid membranes
- D. All of these Discuss
Correct Answer: All of these
- 10. Assume the combined processes of photosynthesis and cellular respiration, the electrons that start as part of H2O at the beginning of the light reactions end up attaching to
Options- A. O2 to make new H2O
- B. NADPH to make new glucose
- C. pyruvate to make ethanol
- D. electron transport carriers to make O2 Discuss
Correct Answer: O2 to make new H2O
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