Light energy oxidizes H2A (light reaction): 2H2A ⎯light → 2A + 4[H] ⎯ 2. The reducing agent [H] reduces CO2 (dark reaction): 4[H] + CO2 ⎯→ CH2O + H2O A. Absorption of light - The principal photoreceptor is chlorophyll (Chl) derived from protoporphyrin IX. - Major differences between chlorophyll and hemes are: - Chl has an extra ring (V) (cyclopentanone). - Ring IV of Chl is more reduced. -
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Claire Graham BSC 2010L November 4th‚ 2015 Effects of Light Intensity and Wavelength on Photosynthesis of Spinach Leaves By replacing the air pockets in spinach leaf disks with a bicarbonate solution and allowing the disks to sit in the solution while being exposed to different light conditions‚ we were able to observe the effects of various light intensities as well as colors on the rate of photosynthesis. As the spinach leaves photosynthesized‚ oxygen pushed out the solution and filled the intercellular
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main stages in photosynthesis - light-dependent and light-independent stages. [11] The light-dependent stage depends on the light because the energy from the light is used to split water in the process of photolysis and excite electrons in the chlorophyll. [11] The products from the light-dependent stage are ATP and the electron acceptor - reduced NADP. [11] The products from the light-dependent stage are fed into the light-independent stage of photosynthesis‚ the Calvin cycle. [11] Carbon dioxide
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In conclusion‚ one can determine how photosynthesis is impacted by light intensity through the experimentation on ivy leaf disks in a bicarbonate solution. The function of the sodium bicarbonate in this experiment was to provide a sufficient amount of carbon dioxide (CO2) for the photosynthesis process to occur. Without CO2 or any of the other necessary reactants‚ glucose nor oxygen cannot be produced. The leaves rise and sink due to photosynthesis occurring in the plant cells. As the carbon from
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Elodea & Photosynthesis Photosynthesis is the process by which green plants and some other organisms use sunlight to synthesize nutrients from carbon dioxide and water. Photosynthesis in plants generally involves the green pigment chlorophyll and generates oxygen as a by-product. Introduction This lab has been created in order to find what extent does distance from a light source (5cm‚ 10cm‚ and 15cm) affect the rate of photosynthesis (measured in bubbles / 3 min) in Elodea water plants. Hypothesis:
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Assessment Item 14 Beaudesert State High School An Investigation into the Roles of Nitrogen and Phosphorous in the Growth of a Wheat Crop By Alannah Hardgrave [pic] Table of Contents • Summery – Page 3 • Aims of Trial – Page 4 • Review of Literature – Page 5 • Method and Materials – Page 6 • Results – Page 9 • Discussion – Page 12 • References – Page 14 [pic] Summary This report was composed
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DEVELOPMENT OF THE INTERNODE LENGTH OF VIGNA RADIATA WHEN GROWN UNDER DIFFERENT LIGHT INTENSITIES ABSTRACT Throughout their growth plants exhibit varying ways to adapt and change depending on their circumstances‚ with changes in the amount of available light being a major factor in plant growth. The aim of the study was to determine whether there are significant differences in the growth patterns of Vigna radiata when grown under varying light intensities. Plants were grown in two different light
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[Type the company address] [Type the company address] Chemistry Hydroponics EEI Cody Yakimoff Year 11 – Mrs Bev Gallus Chemistry Hydroponics EEI Cody Yakimoff Year 11 – Mrs Bev Gallus 08 Fall 08 Fall “Gardening is not a rational act” ~ Margaret Atwood (Canadian poet‚ essayist‚ environmental activist) “Gardening is not a rational act” ~ Margaret Atwood (Canadian poet‚ essayist‚ environmental activist) INTRODUCTION 4 RESEARCH 5 AIM 6 HYPOTHESIS 6 RESEARCH INTO RELEVANT
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Virtual Lab: Optimizing Photosynthesis Maria Diaz March 12‚2012 Pre-Lab Questions 1. Which two variables are controlled in a similar manner? The two variables that can be controlled in a similar manner are CO2 & the light level. 2. How can you get the results to the investigation faster? You can get the results to the investigation faster by adjusting the speed at the bottom of the water weed simulation. 3. How will you be able to determine the rate of photosynthesis
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In the BIO 14 Lab‚ the organismal system used for the last of three labs this semester is the Mimosa pudica plant. In these three weeks the stimulus-response of these plants will used to conduct experiments on the phenotypic plasticity of Mimosa pudica. Phenotypic plasticity is the ability of an organism to change its phenotypic traits in response to changes in the environment. And while very beneficial in some ways such as by allowing organisms to adapt to a changing environment quickly‚ it also
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