Science Research Coursework - Photosynthesis

Topics: Photosynthesis, Calvin cycle, Adenosine triphosphate Pages: 3 (739 words) Published: March 13, 2014
The effect of the concentration of carbon dioxide on the rate of photosynthesis The rate of photosynthesis increases with the concentration of carbon dioxide. This is because the concentration of carbon dioxide determines the rate at which carbon is incorporated into the glucose made in the light-independent reaction of photosynthesis – the Calvin cycle, until the process is limited by other factors. When there is a high concentration of carbon dioxide the carbon is fixed into the sugars produced, by the essential enzyme RuBisCo, also known as Ribulose-1, 5-bisphosphate carboxylase/oxygenase. However, with a low concentration, the RuBisCO binds with oxygen, which does not make the desired sugars and wastes energy in photorespiration. http://en.wikipedia.org/wiki/Photosynthesis#Carbon_dioxide_levels_and_photorespiration[1] http://www.passmyexams.co.uk/GCSE/biology/factors-affecting-rate-of-photosynthesis.html[2]

Data on the effect of carbon dioxide on the rate of photosynthesis CO2 Levels
Number of Bubbles – Oxygen produced in photosynthesis
(light intensity = 8, colour = white)
1.0
8
2.0
16
3.0
20
4.0
20
5.0
23
6.0
27
7.0
25
8.0
28
9.0
25
10.0
29
http://www.biologycorner.com/worksheets/waterweed_sim_teacher.html[3]

Other factors which affect the rate of photosynthesis in glasshouses Light:
The intensity of the light is crucial for the process as the light-dependent reactions of photosynthesis are necessary for the process to take place; light is absorbed by the green chlorophyll pigments in chloroplasts that are mostly found in the leaf cells of the plants so it can be used to produce the compounds: reduced nicotinamade adenine dinucleotide phosphate (NADPH), adenosine triphosphate (ATP), and also oxygen. So the rate of photosynthesis increases linearly with increasing light intensity. http://en.wikipedia.org/wiki/Photosynthesis[4]...
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