The Effect Of Photosynthesis On The Rate Of Photosynthesis

Abstract: During photosynthesis plants take light energy and turn it into chemical energy. The purpose of the study was to test the effect of various lighting conditions on the rate of photosynthesis. In this experiment the rate of photosynthesis is measured by timing how long it takes photosynthesis to occur in ten leaf disks that are in a solution of carbon dioxide. The prediction for this experiment was that if a plant receives more light, then it will have a higher rate of photosynthesis. The data supports the hypothesis, because the rate of photosynthesis is higher in direct sunlight than in the shade. This experiment untimely lead to the conclusions that light and carbon dioxide are necessary for photosynthesis to occur.†¦show more content†¦This light is then converted into a chemical energy by the chlorophyll and other pigments within the plant. This energy is used for the process of photosynthesis. During photosynthesis, water molecules split apart, releasing elect rons and hydrogen ions and producing oxygen gas. These electrons and hydrogen ions are then used to generate ATP and NADPH. Both ATP and NADPH are also used in the light independent reaction, which is the second part of photosynthesis. This reaction occurs in the stroma of the chloroplasts. In contrast to the light dependent reaction, this type of reaction can occur without light. During the light independent reactions of photosynthesis ATP and NADPH are required to form glucose. Adenosine triphosphate, often called ATP, is used to construct organic molecules from carbon dioxide and water. Nicotinamide adenine dinucleotide phosphate, often called NADPH, reduces carbon dioxide and produces monosaccharides for use by the plant. Materials Methods: ïÆ' ¼ Prepared solution containing 1.5 sodium bicarbonate in 300 ml water and 2 drops liquid soap ïÆ' ¼ Large plastic syringe 20-65 ml with no needle ïÆ' ¼ #3 cork borer with plungers ïÆ' ¼ Spinach Leaves ïÆ' ¼ Two plastic cups ïÆ' ¼ One glass beaker ïÆ' ¼ Timer ïÆ' ¼ Light source ïÆ' ¼ Paper Towels ïÆ' ¼ Cover: Cup covered by foil ïÆ' ¼ Mouse pad for cutting surface This experiment was performed using the procedure from the Photosynthesis in Leaf Disks Lab. First using a #3Show MoreRelatedThe Effect Of Photosynthesis On The Absorbance Rate808 Words   |  4 Pagesunder the lights, the absorbance rate continues to decrease toward zero. Once our 30 minutes were up, the absorbance rate in each tube was significantly lower than at the start of our experiment. In contrast the two control groups did significantly lower the absorbance. Each control lacked one of the vital aspects of photosynthesis, one being light, and the other being chloroplast. 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