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Essay biology process of photosynthesis
Short note about photosynthesis
Short note about photosynthesis
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Introduction: Theodor’s experiment was created in part to learn which wavelengths (colors) of light were most effective in carrying out photosynthesis and to prove that it occurs in chloroplast. The experiment was inspired by Theodor’s observation of aerobic bacteria. Theodor observed that aerobic bacteria would move towards the chloroplasts of green algae. Theodor hypothesized that the reason why the bacteria moved toward the chloroplasts was because the organelle generated oxygen via photosynthesis. If photosynthesis occurs in chloroplasts, then the bacteria would aggregate on the chloroplasts producing the most oxygen. Theodor’s experiment was essential because it demonstrated that chloroplasts were the site of photosynthesis. Furthermore,
The hypothesis for this experiment was that the cell fraction in the cuvette marked P2 will have more chloroplast activity because it will exhibit greater color change and differences in the absorbance readings compared to the other cuvettes when exposed under the condition of light; moreover, this notion was believed to be so because the more a cell fraction is centrifuged, the more intact chloroplasts we’ll find (Leicht and McAllister,
The high rate of absorbance change in blue light in the chloroplast samples (Figure 1) can be attributed to its short wavelength that provides a high potential energy. A high rate of absorbance change is also observed in red light in the chloroplast samples (Figure 1), which can be accredited to the reaction centre’s preference for a wavelength of 680nm and 700nm – both of which fall within the red light range (Halliwell, 1984). Green light showed low rates of photosynthetic activity and difference in change in absorbance at 605nm in the chloroplast samples (Figure 1) as it is only weakly absorbed by pigments, and is mostly reflected. The percentage of absorption of blue or red light by plant leaves is about 90%, in comparison to the 70–80% absorbance in green light (Terashima et al, 2009). Yet despite the high absorbance and photosynthetic activity of blue light, hypocotyl elongation was suppressed and biomass production was induced (Johkan et al, 2012), which is caused by the absorption of blue light by the accessory pigments that do not transfer the absorbed energy efficiently to the chlorophyll, instead direction some of the energy to other pathways. On the other hand, all of the red light is absorbed by chlorophyll and used efficiently, thus inducing hypocotyl elongation and the expansion in leaf area (Johkan et al, 2012).
... has more CO2 than the negative controls. There will be more spinach circles in the red food coloring than the green and blue food coloring. My hypothesis was supported for both experiments.
An Analysis and Evaluation of Data from Photosynthesis Experiments Graph analysis This is my analysis for the investigation in to the affect of light intensity on the rate of photosynthesis to the Canadian pondweed, elodea. In the results the pattern is that when the light intensity is higher the readings are generally higher. On the graph the less the light intensity the lower the gradient of the curve. the equation for the photosynthesis process is; CO2 + 2H2O + Light Energy = =
The process of photosynthesis is present in both prokaryotic and eukaryotic cells and is the process in which cells transform energy in the form of light from the sun into chemical energy in the form of organic compounds and gaseous oxygen (See Equation Below). In photosynthesis, water is oxidized to gaseous oxygen and carbon dioxide is reduced to glucose. Furthermore, photosynthesis is an anabolic process, or in other words is a metabolism that is associated with the construction of large molecules such as glucose. The process of photosynthesis occurs in two steps: light reactions and the Calvin cycle. The light reactions of photosynthesis take place in the thylakoid membrane and use the energy from the sun to produce ATP and NADPH2. The Calvin cycle takes place in the stroma of the chloroplast and consumes ATP and NADPH2 to reduce carbon dioxide to a sugar.
filters and count the number of oxygen bubbles given off using a pencil dot technique. Prediction I predict that with a blue filter the photosynthetic rate will be the as blue is a highly absorbent color it also has a short wavelength carries the most energy. The color to have the least photosynthetic rate will be green as it has quite a short wavelength so a lot of energy will be reflected by the plant and not absorbed in the sand. Yellow and orange will have average photosynthetic rates. although orange will be slightly more as it is more absorbent than yellow even low it has a longer wavelength and does not carry as much.
...hemical energy from cyanobacteria (the only bacteria that can perform photosynthesis) 2.4 billion years ago (Wernergreen). The first chloroplast came into being about one billion years ago when a single-celled protist and a cyanobacterium came together through endosymbiosis, and this first photosynthesizing eukaryotic lineage was the ancestor of land plants, green algae, and red algae. Cyanobacteria and algae endosymbionts have spread photosynthetic capabilities in such a broad range (Wernergreen). In other words, heterotrophic prokaryote cells had taken in autotrophic photosynthetic bacteria cells. The ingested cell continued to provide glucose and oxygen by photosynthesis. The host cell protected as well as provided carbon dioxide and nitrogen for the engulfed cell and overtime both cells lost the aptitude to survive without each other (Weber and Osteryoung).
This is representative of how eutrophication works in an aquatic environment. It shows that the greater the number of blue-green algae then the faster the oxygen depletion
Chloroplasts are and organelle that contains chlorophyll, and is the place where photosynthesis takes place. In a basketball stadium, the concession stands are like chloroplasts. The concession stands is like chloroplast because it makes food for everyone at the game. This is how chloroplasts and the concession stands are alike because they both make food.
* Count the number of bubbles seen in 1 minute which is a way of
Plant pigments are molecules which reflect one color and absorb the rest. Plants use this light for photosynthesis which is the process by which plants make their food for energy. The reason for there being more than one pigment in a leaf is because each pigment can only absorb certain wavelengths of light, so leaves have more than one so they can absorb more light for photosynthesis. The pigments used for photosynthesis are found in the thylakoid membranes. Light must pass through the leaf and into the photosynthetic pigments so it can be absorbed. This is the reason why leaves are so thin. They want light to penetrate the leaf and get into the chlorophyll so photosynthesis can occur. If the leaves were to be thick then no light
The second part of this lab deals with photosynthesis. This lab has several experiments. In the first experiment students will learn about the effects that different colored test tubes have on photosynthesis in elodea sprigs.
Photosynthetic pigments are essential for life because they allow photosynthesis to occur by capturing sunlight which is then used alongside carbon dioxide and water to form organic compounds such as glucose and oxygen. The pigments allow the conversion of light energy to chemical energy which other organisms can benefit from. Oxygen is utilised by other organisms in aerobic respiration. The different pigments present in the chloroplasts allow a wide variety of wavelengths of light to be absorbed for efficient photosynthesis and provide colours to the plant to attract pollinators.
...ed out very well as the plant I tested was correctly done, and it had a band that was yellow/brown where there was no starch present, the same leaf had a black boarder where the paper/foil was not placed, this was black because photosynthesis had occurred and produced starch. Therefore showing that light along with the other core ingredients are important factors for photosynthesis to take place successfully.
An Experiment to Investigate the Effect of Light Intensity on the Rate of Photosynthesis. Introduction Photosynthetics take place in the chloroplasts of green plant cells. It can produce simple sugars using carbon dioxide and water causing the release of sugar and oxygen. The chemical equation of photosynthesis is: [ IMAGE ] 6CO 2 + 6H20 C 6 H12 O 6 + 6O2 It has been proven many times that plants need light to be able to photosynthesize, so you can say that without light the plant would neither photosynthesize nor survive.