PHOTOSYNTHESIS & CELLUAR RESPIRATION LAB REPORT % Absorption 400 425 450 475 500 525 550 575 600 625 650 675 700 Average 47 44 37 27 14 10 8 9 9 10 15 17 14 Use the graph of Average % Absorption for Grass Pigments to answer the following questions. ANSWER ONLY THE QUESTIONS BELOW. YOU WILL LOSE POINTS IF YOUR ANSWER INCLUDES UNRELATED INFORMATION. 1. What specific range of wavelengths explains why grass is green? The absorption of all wavelengths outside approximately
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Light Reactions Lab This lab explores the effect of light intensity and light wavelength on photosynthesis. The quantity of energy [ATP] produced will change depending upon on these parameters. Use "Johnson Explorations: Photosynthesis" located at http://www.mhhe.com/biosci/genbio/biolink/j_explorations/ch09expl.htm Examine the diagram before clicking "skip intro" so you have an idea what is going on. The animation show the movement of photons‚ electrons‚ water‚ protons‚ ATP etc. relating to
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in size and easier to study than human chromosomes. Discussion I observed that polytene chromosomes had formed just like my prediction. This result supports my hypothesis that endomitosis has occurred. I observed that polytene chromosomes were big‚ light and had dark banding patterns with all homologous pairs of chromosomes connected to chromocentre similar to Baudisch ’s observation in his 1977 paper. The disadvantage of the method used was that the extraction process was very hard and without lots
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difference in Daphnia’s response when exposed to red light compared to white light. Thus‚ the null hypothesis was rejected and the experimental hypothesis was accepted. These findings could be due to the negative phototactic response that occurs when they are exposed to visible light that are above 600 Mn (nanometers) that are also considered the color red. This shows that Daphnia have a greater phototactic reaction to red light than when exposed to white light. When compared to a similar study‚ the same
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Plan I plan to investigate how light intensity affects the rate of photosynthesis in pondweed. The rate of photosynthesis will be measured by the number of bubbles given off (considering that oxygen is produced as a waste gas during photosynthesis). The light intensity is measured by the distance between the lamp and pondweed. Fair test: Fix: the amount of pondweed‚ the amount of water and sodium hydrogen carbonate solution in the test tube‚ the time allowed for each experiment Change: the
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How light intensity effects the Rate of photo synthesis. Aim The aim of my experiment is to find out how light intensity affects the rate of photosynthesis. Prediction I predict that as the light intensity increases that the rate of photosynthesis will increase in proportion‚ so for example if you increase the light intensity from 10cm away to 20 cm away form a stationary plant. There for the rate of photosynthesis will decrease proportionally with the distance of the light from the plant (in
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the light and the rate of photosynthesis and instead it starts relatively high then decreases and increases again. The colour red gives the highest rate of photosynthesis (89 bubbles per minute) with blue giving the second highest rate of photosynthesis (70 bubbles per minute)‚ and yellow giving the third highest rate of photosynthesis (64 bubbles per minute) and green with by far the least (44 bubbles per minute). Although‚ we can see no direct correlation between the rate of photosynthesis and
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determine the wavelength and light intensity effect on the reaction rate of photosynthesis. Photosynthesis is the conversion of light energy to chemical energy in the form of organic compounds. There are two phases in photosynthesis‚ the light reaction and dark reaction. The following experiment tested only the light reaction. Photosynthesis takes place on the chloroplast‚ and the chloroplast contains chlorophyll pigments which absorb light energy. Pigments are particular to different wavelengths. The following
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Light‚ Color and Solutions Effects of Concentration and Cell Path Length on a Solutions Absorbance To examine the relationship between color of a solution and the light it absorbs. When it comes down to it our eyes do a accurate job of depicting and distinguishing colors. The purpose of this experiment is to take that a little farther‚ become more precise. With the use of a spectrophotometer one can determine the wavelength and intensity of the light absorbed. By adding a light source to the
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Section 1 Purpose: The purpose of this lab was to separate plant pigments using chromatography‚ calculate Rf values using the collected data‚ and study photosynthesis with isolated chloroplasts. Light energy Light energy Background Information (Activity A): In photosynthesis‚ plant cells convert light energy into chemical energy that is stored in sugars and other organic compounds. It is an endergonic and anaerobic reaction. Critical to the process is chlorophyll‚ the primary photosynthetic pigment
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