Grishma Patel Chloroplast Pigments and Colored Light Absorption Summary The purpose of executing this lab was to see how different wavelengths and colors of light are absorbed by chloroplast pigments. The goal was to see the variations of light dependant reactions of photosynthesis based on different types of light. Spinach was used by grinding it with acetone and acquire the thylakoids used in the experiment. DCIP was used in this experiment as the oxidizing agent that will turn blue to clear when in contact with light. The experiment required us to test first the relationship between wavelength of light and absorbance.
Photosynthesis is the process the energy from sun lights to produce ATP which is used to make sugar such as glucose, sucrose, cellulose, and starch. Photosynthesis involves two different processes, which are light dependent reaction and light independent reaction. Light dependent reaction requires light energy to split water molecules (photolysis) into hydrogen ions (H^+), oxygen (O_2) and electrons to make ATP and the light dependent reaction allows plants to grow and make a waste product (oxygen), energy conversion reactions, convert solar energy to chemical energy. In the light independent reaction stage, H^+ and ATP are used to fix 〖CO〗_2 to make organic molecules. Sugar can be produced by the process of Calvin cycle in the chloroplasts
Because carbon dioxide is absorbed by the plant during photosynthesis less carbon dioxide present in the chamber is a sign that photosynthesis is working. The four lights used for this experiment range across the light spectrum on both sides in order to test a wider variety of wavelengths. All lights will be placed directly on the spinach leaf at the same distance so as not to give any spinach leaf a different light intensity, which could affect the data. This experiment will be able to show which light, ranging across the light spectrum, will allow the Spinach to perform photosynthesis more efficiently. Hypothesis: If four lights (UV Light, LED Light, Infrared Light, and Blue Light) are used to perform photosynthesis on a spinach leaf, then the spinach will respond most to the blue light and perform a more efficient photosynthetic process.
Purpose: The purpose of this experiment is to see how long it takes for the 10 spinach leaf discs to undergo photosynthesis and thereby rise in the two solutions. Hypothesis: All of the leaf discs in the sodium bicarbonate solution should be floating before the discs in plain water because the bicarbonate is a carbon source that will allow photosynthesis to continue. Background: Light is absorbed by leaf pigments (chlorophyll) which makes electrons within a photosystem moved to a higher energy level. The leaves then make ATP, which reduces NADP to NADPH, and add CO2 into organic molecules. When the leaves go through the process of a light-dependent reaction by being placed in water, oxygen is created through photosynthesis and is released into the interior of the leaf.
Water is absorbed by the plant through the roots through the process of osmosis, which then exits the plant through the openings of the leaves, known as the stomata. Water is able to move up the roots of the plants by cohesion and adhesion. This is an important process that plants must go through in order to obtain H+ ions from the water which are required to perform photosynthesis. The movement of
To demonstrate synthesis of Indigo through the Baeyer-Drewson reaction, and subsequent vat dying of cotton through conversion to and from Leucoindigo. Indigo (Vat Blue 1) is a vat dye with a molecular formula of C16H10N2O2. A characteristic of vat dyes is that they are insoluble in most aqueous environments. A reducing agent is required to convert them into a soluble “leuco” form, meaning “white” or colourless. The dye can subsequently be reversed back into its original coloured form through oxidation.
Introduction: What is photosynthesis? The chemical progress of photosynthesis is when a green plant and sometimes other organisms produce O2 (oxygen) by using the light energy from the sun, CO2 (carbon dioxide) and water. The green colour pigment is created by chlorophyll in the plant. 6 CO2 + 6 H2O –> C6H12O6 + 6O2 Carbon dioxide + Water –> Glucose + Oxygen Research question: How does the rate of photosynthesis change in Cabomba pond weed when the changing variable is the light intensity? Hypothesis: I predict that the closer the light gets to the cabomba pond weed the faster it produces oxygen.
Advanced Biology Photosynthesis Lab Report By Cheryl G11 Introduction & Background Photosynthesis is the process by which light energy is converted to chemical energy. It occurs within each chloroplast in most of the green plants, and Carbon dioxide is one of the main components of this process. Plants use photosynthesis to produce their own food (glucose), some water and the oxygen that we need. The overall balanced equation is: 12 H2O+ 6 CO2 → 6 H2O+ C6H12O6 + 6 O2 Sunlight energy Where: CO2 = carbon dioxide H2O = water Light energy is required C6H12O6 = glucose O2 = oxygen Purpose Through this experiment, we want
This is due to the boiling points of the two compounds are too close for an effective simple distillation. A simple distillation only works when the boiling points of the two compounds are separated by at least 50 °C (CITATION). Meanwhile, the boiling points of the compounds of the mixtures are 82.3 °C for 2-pronanol and 117 °C for 1-butanol (National Center for Biotechnology Information). As well, while fractional distillation is more difficult due to the added fractionating column and insulation, it allows for better separation and condensation of the individual compounds. This ensures that only the compound with the lower boiling point is completely condensed before the compound with the higher boiling point begins to condense.
As light intensity is increased further, however, the rate of photosynthesis is eventually limited by some other factor. (Benckiser, 2013) So the rate reaches a maximum. At very high light intensity, chlorophyll may be damaged and the rate drops steeply. This source is reliable as it is a document that focuses on the limiting factors that affect photosynthesis and pertains to this experiment because according to the graph provided, a plant photosynthesises at different rates at different times of the day. According to a school-curriculum based website which supports this source (IGCSE, 2014), a plant is unable to harvest light at high intensities and the chlorophyll system can be damaged by very intense light levels.
The slope and intercept of the linear regression line is -0.01 3.3x10-5 and 0.02x10-1 1.9x10-6 respectfully. The smaller elements like He and H have less peaks because they have less electrons than the bigger atoms and compound. Then the less electrons that are at that wavelength, the less smaller the peak. The observed Carbon Dioxide and neon spectra look extremely different than the NIST graphs just like the rest of the graphs for all of the elements differ from the references.
Algae is an autotrophic protists that carry oxygen-generating photosynthesis. So by the water and the sun combining and the water running it down stream it enters the earth and helps the earth grow. Just like we need food, water, and sunlight to help our body function. The evolution of the eukaryotic has been around for some time. Eukaryotic represent new ways of organizing cell structures and novel strategies for propagating life.
The beginning reaction that occurred at the pH level of 1 shows that the mean reaction rate was incredibly low, at 2 mL/minute. This then increased by 57 units once it reached its peak productivity of 59 mL/minute observed at pH 8. pH levels 6, 7, and 8 only varied between 1 and 2 mL/minute, which demonstrated similar rates of reaction. At pH 10, the reaction rate decreased considerably as it declined by 58 mL/minute, and maintained that productivity at pH 12. The scatter graph included in the results section further solidify and visually represent these observations. The reaction rate of the catalase exposed to pH 1 is barely conceivable on the diagram as its average rate of reaction was 2 mL/minute.