Photosynthesis is a chemical process by which green plants use the radiant energy to synthesize certain nutrients using water and carbon dioxide. This process to happen efficiently it requires the presence of light, water carbon dioxide, chlorophyll and enzymes. During the process of photosynthesis, carbon dioxide plus water in the presence of sunlight, enzymes and chlorophyll produce glucose and oxygen as waste product. The radiant energy is broken down the water into hydrogen atom and oxygen atoms, these atoms combine with carbon dioxide to make glucose and oxygen. As the radiant energy reaches the leave of a plant it penetrates through till it reaches the chloroplast, it then goes through the semi permeable membrane of the chloroplast. At the same time water enters the plant through the roots the water then makes it way up the plant carried by the xylem: this force that causes the water to travel up the plant is called the transpiration pull. This phase of photosynthesis is called the light dependant phase NADPH a co-enzyme takes the hydrogen atom to the light independent phase the hydrogen is taken from the water which splits into its 2 components. As the sun’s rays reach the chloroplast of plant specifically the thylakoids (contain chlorophyll) which are stacked together to form a grana. Without out the radiant energy water will not be able to separate into the water into oxygen and hydrogen. Without radiant energy photosynthesis would not occur. In this experiment we want to determine whether light is necessary for photosynthesis. The predicated outcome of this experiment is that photosynthesis will not occur without the presence of light or radiant energy. The product of photosynthesis is glucose which can also be said to b...
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...4, from Encylopedia: http://www.life.illinois.edu/govindjee/encyc/encarta.htm
KhanAcademy. (2014). Photosynthesis: Light reactions and photophosphorylation. Retrieved March 24, 2014, from KhanAcademy: http://www.khanacademy.org/science/biology/photosynthesis/v/photosynthesis---light-reactions-and-photophosphorylation
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The majority of life on Earth depends on photosynthesis for food and oxygen. Photosynthesis is the conversion of carbon dioxide and water into carbohydrates and oxygen using the sun’s light energy (Campbell, 1996). This process consists of two parts the light reactions and the Calvin cycle (Campbell, 1996). During the light reactions is when the sun’s energy is converted into ATP and NADPH, which is chemical energy (Campbell, 1996). This process occurs in the chloroplasts of plants cell. Within the chloroplasts are multiple photosynthetic pigments that absorb light from the sun (Campbell, 1996).
3) The chloroplast will be subjected to two experimental conditions- light, and the absence of light, using a spectrophotometer to determine the amount of DPIP reduced at specific time intervals under each condition.
... in the chloroplasts in some of their cells. Chlorophyll allows the energy in sunlight to drive chemical reactions. Chloroplasts act as energy transducers, converting light energy into chemical energy. So as the plant has more light the chlorophyll inside the chloroplasts can react faster absorbing in more light for food and energy.¡¨ So this shows my prediction was correct for in my experiment and shown in my result table and graph the more light intensity there is on a plant the higher the rate of my photosynthesis will be. My prediction is very close to what I said the results will be so my prediction was correct and has been proven to be correct in my result table, graph and now explained again in my conclusion.
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).
The Effect of Light Intensity on the Rate of Oxygen Production in a Plant While Photosynthesis is Taking Place
The Prentice Gallery Chemistry book defines photosynthesis as, “The procedure by which green plants and algae use radiant power from the sun to fuse glucose from carbon dioxide and water.” The glory of discovering photosynthesis does not belong to any one scientist, but rather numerous scientists contributed to refining the concept we now know as photosynthesis. Before describing the process of photosynthesis, I will provide a brief description of several of the important events that led to its discovery.
Photosynthesis is a highly important process that takes place in plants primarily because without it life on this planet would not be able to function properly. “It produces the oxygen we breathe and the food we eat” (Harbinson). Without photosynthesis, life would not be able to sustain itself and our planet would be a barren wasteland. The Photosynthetic process converts light energy into chemical energy. The energy that’s created through the process then later is used to help fuel the organism’s activities. This process can be significantly more complicated than it sounds with different stages and many steps.
Introduction: Photosynthesis uses the sun’s energy and uses it to convert carbon dioxide and water into sugar. There were two plants that stayed outside in the sunlight and two plants that were inside only receiving sunlight from the window. If the plants stay outside then they will grow at a faster rate and will be the tallest with most leaves because they receive more sunlight from the sun and have a fresher environment. Methods: Both the plants inside and outside were exposed to sunlight and given water every day. Results: The plants inside grew more than the plants inside. The plants outside did not last all of the weeks the experiment was being conducted.
Photosynthesis is a series of light driven reactions that convert energy poor compounds such as carbon dioxide and water to energy rich sugars [1] such as glucose. The process generate an electron gradient across the membrane of a chloroplast, which is used for ATP synthesis, and simultaneously produces electrons used to make NADPH, using NADP+ as an energy carrier[2]. Crudely put, it is the method by which autotrophic plants make their own ‘food.’
Photosynthesis in simpler turns is the ability of a live plant to carry on its chemical process by the use of light energy. Photosynthesis can not take place when there is absolutely no light, instead it stores the light it captures during the day, and uses it when needed. Photosynthesis can take place in land plants and aquarian plants such as algae. There are many factors that influence the ability of a plant to go through photosynthesis, such as light, the color of light and amount of water and or light.
Light is a very important factor in the rate of photosynthesis, in my project I am going to test that plants do need light in order to photosynthesise. It will be very interesting to see how light will influence the rate of photosynthesis in plants and what will happen if they do not get the required light in order to produce starch .
The photosynthetic pigments are important because they donate the electrons needed to start the sequence of reactions
The carbon cycle is a very helpful and unique cycle which allows carbon to be exchange
Photosynthesis is the process in which living cells from plants and other organisms use sunlight to produce nutrients from carbon dioxide and water, the image below “Diagram of photosynthesis 1,” helps show this process. Photosynthesise generally creates oxygen as a by-product through the use of the green pigment, chlorophyll, found in the plant that helps this reaction occur. “Photosynthesis provides us with most of the oxygen we need in order to breathe. We, in turn, exhale the carbon dioxide needed by plants,” (factmonster,2017). This is able to show us why photosynthesis is so greatly needed to occur through plants in order to give one another essentials needed for continuity of life. “Plants perform photosynthesis because it generates the food and energy they need for growth and cellular respiration,” (photosynthesieeducation, 2016).
Photosynthesis is a key contributor to all living things; photosynthesis provides the oxygen, food, and nutrients that help all living things stay healthy and alive. Photosynthesis converts solar energy into the chemical energy of a carbohydrate. Photosynthetic organisms, including land plants, algae, and cyanobacteria, which are called autotroph...