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For this lab the focus is Photosynthesis, and in particular we will be focusing

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For this lab the focus is Photosynthesis, and in particular we will be focusing on the pigments that trap solar energy thereby providing the energy required for this anabolic process. Anabolic means that we are dealing with chemical reactions that 1) build complex products from simpler reactants, 2) require energy and 3) the products produced store energy within their chemical bonds. The general process -the chemical formula- for photosynthesis is shown below.Two simple reactants (CO2 and H2O) are used to build a complex product (glucose). The other simpler product of the reaction, the oxygen gas, is simply a byproduct of the anabolic production of glucose. Sunlight, specifically the high energy photons of sunlight (solar energy), provide the Energy to build the chemical bonds of glucose. Specifically, the photon energy is converted to electron energy and cellular energy (ATP).Photosynthesis is simple in concept. In a nut shell, the water is split (solar energy used to split water into hydrogen(H2) and oxygen(O), and then the freed hydrogen atoms (H2) are used to reduce the carbon dioxide. Imagine inserting the “H2” into the CO2 to form a carbohydrate unit…..CH2O…. Put 6 of these -CH2O-together with chemical bonds and you have a glucose molecule. Water is split and carbon dioxide is reduced. Voila! We have produced glucose, a 6 carbon sugar!In concept simple and elegant. However, it takes a lot of chemical steps. These are all divided into two sets of reactions: the light reactions and the Calvin Cycle. We are NOT going to go through these reactions-you will cover these in another course . Here today we are ONLY going to be looking at the pigments that capture the solar energy, required to fuel the process. I would like you to watch yet another Amoeba sisters YouTube video, on photosynthesis, as an introduction to the lab. Don’t get bogged down in the details of the light reactions and calvin cycle. I think it just helps to get a bigger overview picture so that you can appreciate the importance of the pigments we will be examining… (Links to an external site.)So to complete this lab exercise….Participate in the Zoom lecture/overview of photosynthesis and paper chromatography.
Watch the You Tube posted above

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