Lesson 4 Laboratory: Photosynthesis Introduction: Elodea is a species of aquatic plant often called waterweed. Like other plants‚ Elodea absorbs carbon dioxide and releases oxygen during photosynthesis. In this lab‚ an Elodea specimen is submerged in water under a lamp with a filter that can change the color of the light. We will measure Elodea’s rate of photosynthesis by measuring the amount of oxygen it produces. We will investigate the effects of light color and light intensity on Elodea’s rate
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Associate Program Material Cell Energy Worksheet Answer the following questions: Cellular respiration: • What is cellular respiration and what are its three stages? Cellular respiration is the aerobic harvesting of energy from food molecules. The first stage of cellular respiration is Glycolysis. The second stage of cellular respiration is the citric acid cycle. Lastly‚ the third stage of cellular respiration is the electron transport. • What is the role of glycolysis? Include
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Theodor Wilhelm Engelmann was a German microbiologist whose 1882 experiment measured the effects of different colors of light on photosynthetic activity and showed that the conversion of light energy to chemical energy took place in the chloroplast. In 1881‚ he observed the movement of bacteria towards the chloroplasts in a strand of “Spirogyra” algae. Engelmann hypothesized that the bacteria were moving in response to oxygen generated by the photo synthetically active chloroplasts in the algae.
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Lil Dejay C4 2/10/14 Photosynthesis: Making Energy Chloroplasts Photosynthesis is a process in which sunlight energy is used to make glucose. The site of photosynthesis is in the chloroplast – an organelle found in the leaves of green plants. The main functions of chloroplasts are to produce food (glucose) during photosynthesis‚ and to store food energy. Chloroplasts contain the pigment‚ chlorophyll. Chlorophyll absorbs most of the colors in the color spectrum‚ and reflects only green and yellow
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value for this measurement as the initial measurement of the intercept. o Return to the curve-fitting view and enter this P value directly into the intercept box. • Slope (of the line): photochemical efficiency; indicates the rate at which photosynthesis increases as light intensity increases. o To manipulate the slope: click on the up arrow next to the slope function (you will see the line rise up and begin to form a curve). o Increase the slope of the line until the curve looks like it
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some sort of derivatization technique since the introduction of a chromophoric moiety can substantially improve the sensitivity‚ and a suitable tagging of reducing saccharides usually results in enhanced resolution and less matrix disturbances. Chromatography is the method most used for commercial sugar separations. Such separations are batch processes and normally imply expensive installations‚ low productivity and low yields of the desired product. Gas chromatographic analysis of mono and disaccharides
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reduce water resistance. The leaves of the floating plants are broad‚ leathery and thick. This is because to prevent water to diffuse easily into the plants and this can prevent the plants from drowning. It also creates a large surface area for photosynthesis
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some bacteria. A small number of bacteria‚ including the ancient Archaea group are capable of generating food from sulfur or other chemical reactions‚ but the majority of autotrophs rely on sunlight to carry out a process called photosynthesis. In the process of “photosynthesis”‚ specialized molecules capture carbon from the air and bind it to water using energy produced from sunlight. There are two classes of autotrophs: chemoautotrophs and photoautotrophs. Chemoautotrophs are able to “fix”
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A. Converting photosynthesis rate from volume of oxygen produced per gram leaf per minute to mol CO2 fixed per area of leaf (in m2) per second. B. Why would one want to express photosynthesis rate as µmol CO2 m-2 s-1? What is the advantage. Answers: A. How to convert photosynthesis rate from volume of oxygen produced per gram leaf per minute to mol CO2 fixed per area of leaf (in m2) per second. Photosynthesis rate can be measured either by seeing how much oxygen is produced by a leaf
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by means of Anion-Exchange Chromatography. Carbohydrates are weak acids with pKa values ranging between 12 and 14. At high pH they will be either completely or partially ionised depending on their pKa value. Due to the extreme alkaline conditions only polymeric anionexchange columns are suitable for
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