Review the chemical reaction for photosynthesis and then carefully examine your results from Procedure I. Do your results support the relationship between oxygen and carbon dioxide shown in the chemical reaction? Explain. Cite your results as part of your explanation. Using your results for change in oxygen concentration as a reference, discuss whether your results from Procedure I confirm research findings about differences in the amount of chlorophyll production for sun-adapted and shade-adapted leaves. What is the difference between photosynthesis rate and net photosynthesis rate? Which rate are you determining in this procedure? Explain. Explain why (or why not) you would expect respiration to occur when the illumination is 100%?
Added by Billy B.
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Our results from Procedure I support this relationship between oxygen and carbon dioxide. We observed that as the plant underwent photosynthesis, the oxygen concentration increased while the carbon dioxide concentration decreased. This is consistent with the Show more…
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1. In order for photosynthesis to occur the following must be present (hint: review the photosynthesis equation): a. _________________________________ as the energy source. b. _________________________________ as the carbon source. c. _________________________________ as the electron donor. d. _________________________________ for the absorption of light energy. 2. Explain why grow lights for house plants are never green. 3. Explain why plants that have been kept in the dark for a week will still be able to conduct cellular respiration. 4. Describe the purpose of the light-dependent reactions and where they occur in the chloroplast. 5. Describe the purpose of the light-independent reactions and where they occur in the chloroplast. 6. For your observations during the carbon fixation experiment, suggest a way in which it would be possible to measure the rate of photosynthesis.
Supreeta N.
Review the equations below used to describe photosynthesis and respiration (as provided in the background section of this experiment). Why was it important to use germinated seeds without leaves for this experiment? The equation used to describe the process of photosynthesis is shown below: 6 CO2 (Carbon Dioxide) + 6 H2O (Water) + Light Energy (Sunlight) → C6H12O6 (Glucose) + O2 (Oxygen) The general equation used to describe the overall process of cellular respiration is shown below, where glucose and oxygen react to produce carbon dioxide, water, and ATP (Energy). C6H12O6 + 6 O2 → 6 CO2 + 6 H2O + Energy (Energy = 36-38 molecules ATP per 1 molecule of C6H12O6)
Dave K.
9. Describe what happens during the light reactions of photosynthesis by tracing the movement of electrons from water to NADPH. Describe when molecular oxygen is released as waste. 10. Describe how ATP is made during the light reactions of photosynthesis. Be sure to describe what part of the chloroplast has a high concentration of hydrogen ions.
Sri K.
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