Photosynthesis
What would a person think of when they hear the word photosynthesis? “Photo” means light, whereas, “synthesis” means to put together. Sharon Hunter (1999) describes that photosynthesis occurs by leaves using sunlight, carbon dioxide from the air, and water brought up from the roots. The plant puts these ingredients together to make glucose, a kind of sugar that feeds the tree, and oxygen. Plants do not need the oxygen so they release it into the air. Boykin (2003) stated, “Trees sequester carbon dioxide and convert it to oxygen. The average urban tree removes nearly a ton of the greenhouse gas during its first 40 years of life. One wooded acre provides enough oxygen for 18 people, and absorbs as much carbon dioxide a car produces in 26,000 miles.” In this lab experiment, we monitored the light dependant reactions of photosynthesis in the chloroplasts by using the dye DCIP, which was used as a substitute for NADP- . We know that for photosynthesis to occur we must have three main ingredients…light, water, and carbon dioxide (See Figure 1 and 2). According to Roberts (2000), photosynthesis causes plant growth and plants grow better with longer periods of light. Light intensity during the summer is greater due
1. Label six 13 x 100 mm (10 ml) test tubes 1-6 at their tops. 9. Zero the instrument as described in Step 5. You will NOT need to obtain readings on Tube 2 again. 7. Stand Tubes 3-6 in a beaker of water. Take it to the lab area where lamps or flood lights are set up for the photosynthesis incubation period.
Some topics in this essay:
Results Tube,
Dilution Buffer,
Sharon Hunter,
According Roberts,
Wipe Tube,
Stand Tubes,
Experimental Procedures,
Aluminum Foil,
,
Materials Methods,
tube 5,
expected results,
undergo photosynthesis,
carbon dioxide,
tube 6,
10 ml,
% tube,
tube 3,
tube 2,
tube 4,
tubes 3 4,
transmittance values tubes,
obtain % transmittance,
expected results 45-65,
% transmittance values,
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Approximate Word count = 1016
Approximate Pages = 4 (250 words per page double spaced)
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