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to the graph. Mustard plants were der 16 hours (ho 16) of light IOll ours (hour 1 dark for several weeks. Leaves were then excised at different times during a single 24-hour cycle and measured fo before starch content was determined. The graph summarizes the results of these analyses, showing starch conten as starch mass per leaf mass. 8 1 4 8 12 16 20 24 Milligrams of starch per gram of leaf CO

to the graph. Mustard plants were der 16 hours (ho 16) of light IOll ours (hour 1 dark for several weeks. Leaves were then excised at different times during a single 24-hour cycle and measured fo before starch content was determined. The graph summarizes the results of these analyses, showing starch conten as starch mass per leaf mass. 8 1 4 8 12 16 20 24 Milligrams of starch per gram of leaf CO

Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
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Refer to the graph. Mustard plants were grown under 16 hours (hour 0 to 16) of light followed by 8 hours (hour 16 to 24) of dark for several weeks. Leaves were then excised at different times during a single 24-hour cycle and measured for mass before starch content was determined. The graph summarizes the results of these analyses, showing starch content expressed as starch mass per leaf mass. ### Graph Explanation - **Axes**: - The x-axis represents time in hours, covering a 24-hour period. - The y-axis indicates the starch content, measured in milligrams of starch per gram of leaf. - **Data Points and Line**: - The graph shows a line connecting data points at different hours, illustrating the change in starch content over the 24-hour cycle. - There is an increase in starch content from hour 0, peaking at hour 16 (8 mg/g), then sharply declining through the dark period, reaching the lowest point at hour 24. - **Trends**: - The starch content increases during the light period and drops significantly during the dark period. - Error bars are present at each data point, indicating variability in the measurements.
Transcribed Image Text:Refer to the graph. Mustard plants were grown under 16 hours (hour 0 to 16) of light followed by 8 hours (hour 16 to 24) of dark for several weeks. Leaves were then excised at different times during a single 24-hour cycle and measured for mass before starch content was determined. The graph summarizes the results of these analyses, showing starch content expressed as starch mass per leaf mass. ### Graph Explanation - **Axes**: - The x-axis represents time in hours, covering a 24-hour period. - The y-axis indicates the starch content, measured in milligrams of starch per gram of leaf. - **Data Points and Line**: - The graph shows a line connecting data points at different hours, illustrating the change in starch content over the 24-hour cycle. - There is an increase in starch content from hour 0, peaking at hour 16 (8 mg/g), then sharply declining through the dark period, reaching the lowest point at hour 24. - **Trends**: - The starch content increases during the light period and drops significantly during the dark period. - Error bars are present at each data point, indicating variability in the measurements.
**Question:** These data provide evidence to directly support which statement about starch that is formed as the result of photosynthesis in plants? **Options:** 1. Starch is stored within chloroplasts in the form of granules, which can be observed using microscopy techniques. 2. Starch and sucrose are formed from glyceraldehyde 3-phosphate, each of which requires three molecules of carbon dioxide to be fixed by rubisco. 3. Starch is a polymer of glucose and in plants serves as a storage form of carbohydrates generated during photosynthesis. 4. Starch is stored in roots, seeds, and fruits of a plant in addition to its storage in a plant's leaves. 5. Starch stored within a plant's leaves provides a source of chemical energy for the plant at night when its light reactions do not occur.
Transcribed Image Text:**Question:** These data provide evidence to directly support which statement about starch that is formed as the result of photosynthesis in plants? **Options:** 1. Starch is stored within chloroplasts in the form of granules, which can be observed using microscopy techniques. 2. Starch and sucrose are formed from glyceraldehyde 3-phosphate, each of which requires three molecules of carbon dioxide to be fixed by rubisco. 3. Starch is a polymer of glucose and in plants serves as a storage form of carbohydrates generated during photosynthesis. 4. Starch is stored in roots, seeds, and fruits of a plant in addition to its storage in a plant's leaves. 5. Starch stored within a plant's leaves provides a source of chemical energy for the plant at night when its light reactions do not occur.
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During photosynthesis in green plants, light energy is captured and used to convert water, carbon dioxide, and minerals into oxygen and energy-rich organic compounds.

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