Photophosphorylation And The Calvin Cycle

1079 WordsNov 8, 20175 Pages
Photosynthesis is the process in which plants and some bacteria use the radiation from the sun to produce glucose. The process of photosynthesis involves multiple steps, which are photophosphorylation and the Calvin cycle. Photophosphorylation is the process of converting the energy from sunlight into the pyrophosphate bond of an ADP; it is then broken down into two different reactions, noncyclic photophosphorylation and cyclic photophosphorylation. Cyclic photophosphorylation does not involve the reduction of NADP+ or the use two photosystems. When light is absorbed by Photosystem I, the excited electron will enter the electron transport chain to make ATP. Cyclic photophosphorylation does not use water to replenish the electron supply…show more content…
The control did not float for any of the groups at the zero-meter point. The times for the leaf disks in the beaker of sodium bicarbonate solution varied from five minutes to twenty-two minutes. There is no standard deviation for control group as none of the leaf disks floated. The standard deviation for the sodium bicarbonate group at 0 meters is 4.16 minutes, and the mean is 9.42 minutes. The standard deviation for the sodium bicarbonate group at 0.5 meters is 1.38 minutes, and the mean is 10.11 meters. The standard deviation for the sodium bicarbonate at 1.0 meters is nonexistent because none of the leaf disks floated. My graph and table of the data can be seen later in the write up. Does the distance a light is away from leaf disks submerged in water make a difference in the rate of photosynthesis occurs? If the distance from the light source affects the rate of photosynthesis, a light source farther away will lower the rate of photosynthesis. The leaf disks in the beaker that was the closest will be the ones to float the fastest, and the beaker that is the farthest away from the light source will have the slowest time to float. The 0 meter was the quickest of the tested heights to float. The average time for each leaf disk to float was 9 minutes and 25 seconds. 0 meters was the fastest of the 3 tested heights because the leaf disks absorbed more of the light from the bulb

More about Photophosphorylation And The Calvin Cycle

Open Document