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Introduction Photosynthesis is a well perceived performance in which plants and other defined organisms use the energy of photons to convert carbon dioxide and water into a simple macroeconomics sugar known as glucose. Photosynthesis provides the fundamental energy source for essentially all living organisms. The most substantial and valuable byproduct of photosynthesis is oxygen, one of the most abundant elements living organisms depend on. Photosynthesis occurs in many organisms such as green plants, algae, various bacterium, and seaweeds.

These organisms are considered to be sugar factories, producing millions of new sugar molecules (glucose) per second. Glucose, a carbohydrate, is an energy source to build leaves, flowers, seeds, etc. As well, glucose is converted into cellulose, the structural material used in plants to make up their cell walls. Most plants generate more glucose than they use, however it is just not thrown away, it is stored in the form of starch and other scars which is then reserved for extra energy or building materials.

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The metabolic processes of cellular respiration and hedonistic recycle oxygen, as it is a reactant in respiration and a product in photosynthesis. Oxygen is used as the last receptor in the Electron Transport Chain, when the hydrogen ions from the NADIA bind to the oxygen forming water (Freeman, 2002). The water enters the light reaction which then gets oxidized into oxygen. The light reactions undergo a process called photolysis, the splitting apart of water by light, which produces oxygen, hydrogen, and electrons. Photosynthesis makes fixed carbon compounds.

At light intensities above the photosynthesis light saturation range (1 Ft-c), the rate of photosynthesis is much higher than the rate of respiration. As the light intensity decreases the rate of photosynthesis goes down. Eventually, a light intensity is reached where the rates of photosynthesis and respiration are equal; this is called the light compensation point. At light intensities below the light compensation, the plant is starved because its rate of photosynthesis is less than its rate of respiration (Jackson, 2005).

Materials and Methods To estimate photosynthetic activity in a green plant and measure the rate at which oxygen is produced. Increasing the brightness of the light increases the rate of photosynthesis, but only up to a certain point. Reducing the brightness of the light causes a decreases in photosynthetic activity. Hypothesis If the rate of photosynthesis is related to the distance from the light source, then photosynthesis will proceed faster as the distance from the light source decreases. Results Distance Water Traveled vs.. Time Conclusion

As indicated in the first graph, the distance the water traveled in the tube increased as the distance from the light source decreased. This distance traveled is indicative of the presence of photosynthesis occurring, since oxygen produced during photosynthesis will cause water displacement in the tube. The second graph illustrates that the slope increased sharply as the light source approached 25 CM from the tube containing the green plants. These data support the hypothesis that photosynthesis proceeds faster as the distance from the light source decreases.

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