After learning that several factors can affect the rate of photosynthesis, answer the following questions on a separate sheet of paper. 1. What are the factors than can affect the rate of photosynthesis? For nos. 2-3, refer to the figure 3: Fig. 3: Light Intensity versus Rate of Photosynthesis Graph Source: https://sites.google.com/site/plantsmakefood/discussion/factors -affecting-the-rate-of-photosynthesis 2. How will you describe the variable relationship between light intensity and rate of photosynthesis as shown in the graph (points A to B)? 3. What happened to the rate of photosynthesis from points B to C? Why is this so? For nos. 4-5, refer to the figure 4: Fig. 4: Temperature versus Photosynthetic Rate Graph Source: https://quizlet.com/gb/354113497/21-a-graph-to- show-the-effect-of-temperature-on-photosynthesis-diagram/ 4. What happens to the rate of photosynthesis as temperature increases? 5. Why is there a drop of the photosynthetic rate beyond 37°C?
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The factors that can affect the rate of photosynthesis are: - Light intensity - Carbon dioxide concentration - Temperature - Water availability Show more…
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the rate of photosynthesis can be affected by several factors, such as light intensity, temperature ,water, and carbon dioxide. describe how the lack of water in an environment can affect the amount of carbon dioxide absorbed by the plant
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5) A. What processes occur during the Light Reactions of Photosynthesis? B. What molecule is used up (split)? C. What molecules are produced (3 total)? D. What processes occur during the Dark Reactions (Calvin Cycle) of Photosynthesis? E. What molecules are used up (there are 3 total)? F. What molecules are produced (there are 3 total)? G. How specifically are the Dark Reactions (Calvin Cycle) dependent on the Light Reactions? H. How specifically are the Light Reactions dependent on the Dark Reactions (Calvin Cycle)? I. How specifically is Cellular Respiration dependent on Photosynthesis? J. How specifically is Photosynthesis dependent on Cellular Respiration?
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Question 1 Choose the correct statement. Answers: C3 plants metabolism of CO2 only includes the Calvin Cycle. C4 plant metabolism of CO2 does not include the Calvin Cycle. C4 plants catalyze initial CO2 fixation with the same enzyme as C3 plants. C4 plants do not have the enzyme Rubisco. Question 2 Which of the following would be predicted for a grassland in a region where the climate is very hot during the growing season? Answers: a high percentage of the grass species with the CAM photosynthetic pathway a high percentage of the grass species with the C4 photosynthetic pathway a high percentage of the grass species with the C6 photosynthetic pathway a high percentage of the grass species with the C3 photosynthetic pathway Question 3 In the second stage of the Calvin Cycle after initial fixation of CO2, the cycle Answers: reduces the initially produced molecule with electrons donated by NADPH. regenerates ATP from ADP and Pi. reduces the initially produced molecule with electrons donated by ATP. oxidizes the initially produced molecule, producing NADPH. Question 4 When light level increases, but the photosynthetic rate no longer increases, the leaf has Answers: reached light saturation. become light limited. reached its maximum respiratory rate. reached the light compensation point. Question 5 Photorespiration Answers: yields no ATP or NADPH. occurs in mitochondria. increases the sugars produced by photosynthesis. enhances growth of crops. Question 6 Generally, the photosynthetic rate of leaves Answers: initially increases as light level is increased and then plateaus with further light increases. decreases linearly with increases in light level. initially remains constant as light level is increased and then increases with further increases. increases linearly with increases in light level. Question 7 Ribulose 1, 5 bisphosphate carboxylase/oxygenase (Rubisco) catalyzes the reaction that covalently bonds Answers: CO2 to ribulose 1, 5 bisphosphate (RuBP). O2 to ribulose 1, 5 bisphosphate (RuBP). N2 to ribulose 1, 5 bisphosphate (RuBP). a and b Question 8 When CO2 loss due to respiration is balanced by photosynthetic CO2 uptake, the leaf has Answers: reached light saturation. reached the light compensation point. become light limited. reached its maximum respiratory rate.
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