Photosynthesis Lab Report

Organisms that use the process of photosynthesis to create sugar to use for energy have a greater rate of photosynthesis when the intensity of the light source is the greatest. If light is far away from the leaves of a plant, for example, then it takes more time for the light to be absorbed and used in photosynthesis. When it takes more time for the light to reach the leaves, the rate of photosynthesis decreases. As the light intensity increases, I would expect the rate of photosynthesis to increase as well. Therefore, I would expect that when the Elodea is closest to the light bulb, the rate of photosynthesis would be the greatest. My hypothesis would be: If light intensity affects the rate of photosynthesis, and the rate of photosynthesis is measured using the amount of

1.) List all of the colors found in the visible light spectrum (We covered this in lecture)

The results of the mean of the concentrations are as followed; 0%, 0.2%, 2.0% and 1.0% which are in organization of longest float time to shortest. The higher the concentration of sodium bicarbonate (carbon source) the quicker the process of photosynthesis occurs. The mean of the concentrations is; 0% is 900, 0.20% is 757.58, 1.0% is 580.004 and 2.0% is 582.54. The standard deviations of the concentrations are; 0% is 0, 0.20% is 190.0045, 1.0% is 247.9306 and 2.0% is 199.979.

PUS: Pus was 4(6.45%) of which 1(25%) was positive and 3(75%) stained negatively. SUBCULTURE(SC): Subculture (SC) sample was 1(1.61%) and was 0(0 %) positive and 1(100%) negative. TISSUE: 2(6.45%) of the samples were tissue derived of which 2(100%) were positive and 0(0%) negative. ENDOMETRIAL BIOPSY (EB): 4(6.45%) samples came from endometrial biopsy, 0(0%) coming out positive and 4(100%) negative.

Results: Mass of copper wire: 0.28g Mass of empty beaker: 68.49g Mass of beaker and dry copper: 68.84g Mass of recovered copper: 0.35g Percent copper recovered: 0.35g / 0.28g * 100% = 125% Observations: When the 2.0 mL of concentrated nitric acid is poured onto the copper wire, the solutions turns green at first, with a lot of rust-coloured gas coming out the top. The solution slowly turns blue as the copper dissolves, and less gas is emitted. When the reaction is complete, Cu(NO₃)₂ is left in the solution. When Cu(OH)₂ is added to the solution, the solution turns a darker blue and appears to have particles in it.

Photosynthesis is essential to all living organism such as animals and plants. Photosynthesis is a process used by plants and other autotrophs to capture light energy and use it to power chemical reaction that converts carbon dioxide and water into oxygen, carbohydrates and water. (Textbook: Principles of Biology). The reactants and the products of photosynthesis are:

To performed the experiment, a volumeter was set up to measure the net oxygen production under white light, then a second step was followed to measure oxygen consumption under dark conditions (oxygen production only happens in the presence of light and oxygen consumption in the presence of dark light) and finally, a third step consisted of recording the measure of the net oxygen production under the presence of green light.

Photosynthesis Shelly Sterling Professor Soto Bio Lab 111L Shelly Sterling Bio Lab Report 12/3/2017 Photosynthesis Lab

Introduction We hypothesize that different variations of heat will affect the rate of photosynthesis, specifically the more heat, the more photosynthesis, but only to a certain temperature. We believe this because within chloroplast

Introduction Organic reactions are slow and need heat to take place at a suitable rate. Even though the chemicals in the reactions are very evaporative which means that the reactants and products are lost to the atmosphere giving a low yield. Reflux This is a technique that allows organic substances to be heated for a long period of time whilst reducing loss of substances to the atmosphere.

In the sequential pathway of melanin formation, tyrosinase (EC 1.14.18.1) is the rate-limiting enzyme that initializes cascade reactions leading to the formation of melanin 1, 2. Tyrosinases catalyze the oxidation of tyrosine (cresolase/monophenolase activity) or DOPA (catecholase/diphenolase activity) to DOPAquinone 3, which is a highly reactive intermediate and undergoes enzymatic and non-enzymatic reactions to form eumelanin and pheomelanin through separate paths. In most cases, natural melanin pigments consist of both eumelanin and pheomelanin building blocks in varying ratios 2. Tyrosinase gene (NG_008748.1) is located on human chromosome 11q14.3 and contains five exons.

The goal of the experiment was to determine how the rate of photosynthesis responds to the amount of baking soda.   The hypothesis for our experiment, was if we increased the amount of baking soda from 1 gram to 3 grams, then the rate of photosynthesis would increase by 2 chads a minute.   During the experiment both a independent and a dependent variable were present.

We know from the Plank-Einstein relationship that the smaller the wavelength of light, the more energy per photon that light has. This goes to show that these chlorophylls are absorbing more of the low energy photons, red with a wavelength of 700nm, than the high energy photons. Because it is reflecting green, which has a 525nm wavelength, this means that the plant is having to use the low energy photons to make its chemical energy. Now, there are other pigments that can absorb more blue-green light, such as carrots, and these are called carotenoids. These carotenoids do exist in other plants as well, just not in abundance.

However, the photosynthetic process can be affected by different environmental factors. In the following experiment, we tested the effects that the light intensity, light wavelength and pigment had on photosynthesis. The action spectrum of photosynthesis shows which wavelength of light is the most effective using only one line. The absorption spectrum plots how much light is absorbed at different wavelengths by one or more different pigment types. Organisms have different optimal functional ranges, so it is for our benefit to discover the conditions that this process works best. If the environmental conditions of light intensity, light wavelength and pigment type are changed, then the rate of photosynthesis will increase with average light intensity and under the wavelengths of white light which will correspond to the absorption spectrum of the pigments. The null hypothesis to this would be; if the environmental conditions light intensity, light wavelength and pigment type are changed, then the rate of photosynthesis will decrease with average light intensity and under the white light which will correspond to the absorption spectrum of the pigments.

Photosynthesis is defined as a process in which oxygen and glucose are produced from a reaction with the following: carbon dioxide, water, and solar energy, such as sunlight. This process occurs in plant cells in their chloroplasts. Within those chloroplasts are small sacs known as thylakoids. These are located in the stroma of the cell, which is composed of a thick fluid (Urry et al. 2013). The thylakoid membrane is the location of energy absorption.