Photosynthesis leaf disk lab conclusion
[DOC File]Floating Leaf Disk Assay - Mrs. Baur
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Conclusion: Write a 3-sentence conclusion of what you learned in this lab. Floating Leaf Disk Photosynthesis . Name _____ Legend. Title: Floating Leaf Disk Assay Author: Jason Trinh Last modified by: Ryan Miles Created Date: 4/4/2013 12:56:00 AM Company: University of Toronto
[DOC File]The Floating Leaf Disk Assay for Investigating Photosynthesis
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Since cellular respiration is taking place at the same time within the leaf, consuming the oxygen generated by photosynthesis, the rate that the disks rise is an indirect measurement of the net rate of photosynthesis. In this lab, you will measure the net rate of photosynthesis for several plants under various lighting conditions. Materials: 1.
[DOCX File]Miss McCormic's Website
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Leaf disks normally float, however when the air spaces are infiltrated with carbon dioxide, the overall density of the leaf disk increases and the leaf disk sinks. When sodium bicarbonate is added to the water, the bicarbonate ion acts as a carbon source for photosynthesis causing the leaf disks to sink.
[DOC File]A Measure of Photosynthetic Rate In Spinach Leaf Disks
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At 2 minute intervals, invert the syringes to agitate the leaf disks and immediately return them to their positions in front of the lights. Count the number of disks floating after each interval until all disks are floating.
[DOC File]Floating Leaf Disk Assay
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Floating Leaf Disk Photosynthesis Lab. Introduction: Photosynthesis is a process that converts carbon dioxide into sugars such as glucose using energy from the sun. When light is absorbed by pigments in a leaf, the energy absorbed is used to incorporate the carbon dioxide into organic molecules in a process called carbon fixation.
[DOCX File]aphalebiology.webs.com
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If this leaf disk is placed in a solution with an alternate source of carbon dioxide in the form of bicarbonate ions, then photosynthesis can occur in a sunken leaf disk. As photosynthesis proceeds, oxygen accumulates in the air spaces of the spongy mesophyll and the leaf becomes buoyant and floats.
[DOC File]Photosynthetic Photography (Light & Photosynthesis)
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If the leaf is exposed to light, photosynthesis will produce oxygen, which will fill these spaces and cause the leaf to float again. In this experiment, sodium bicarbonate solution will be used to infiltrate the leaf (because it will provide a carbon dioxide source). The time until the leaf disk floats will be a measure of photosynthetic rate.
[DOC File]Designing an experiment to test the rate of photosynthesis
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The punched out leaf disks will initially sink in a test tube of water but will float as photosynthesis occurs. The final assessment for this lab will be a formal lab report recorded in your notebooks to include: hypothesis, experimental design, data collection / analysis, and conclusion (findings).
[DOC File]JENSEN BIOLOGY - Home
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Photosynthesis “Floating Leaf Disk” Lab. Background Information: Photosynthesis fuels ecosystems and replenishes the Earth’s atmosphere with oxygen. Like all enzyme-driven reactions, the rate of photosynthesis can be measured by either. the disappearance of substrate or the accumulation of product (or by-products).
[DOC File]The Floating Leaf Disk Assay for Investigating Photosynthesis
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Infiltrate the leaf disks with sodium bicarbonate solution. Remove the piston or plunger and place the leaf disks into the syringe barrel. Replace the plunger being careful not to crush the leaf disks. Push on the plunger until only a small volume of air and leaf disk remain in the barrel (< 10%).
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