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Photosynthesis Worksheet Arizona State University BIO 282

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BIO 282 Spring 2020 Lecture 14 Worksheet: Photosynthesis How do light-dependent and light-independent reactions provide food for a plant? ____________________________________________________________... _______________ READ THIS: Plants are the original solar panels. Through photosynthesis a plant is able to convert electromagnetic (light) energy into chemical energy. This energy is used not only to keep the plant alive, but also to sustain all creatures that rely on the plant for food and shelter. Plants and photosynthetic algae are also the source of all oxygen on Earth, allowing the inhabitants of Earth to benefit from our most plentiful renewable energy resource. ___________________________________________________________________________ Note - This image is provided as a drawing. To edit it, draw on it, add circles or labels to it, double click the image while in Google Docs. Add in what you need to, then hit “Save and Close”. 1. Consider the organelle illustrated in Model 1. a. What is the name of this organelle? Chloroplast b. Is this organelle more likely to be found in animal cells or plant cells? More likely to be found in plant cells 2. The structures inside the organelle in Model 1 are called thylakoids. What compound necessary for photosynthesis is contained in the thylakoids? Thylakoids contain chlorophyll which is necessary for photosynthesis 3. Consider the chemical reaction in Model 1. This represents photosynthesis. a. What substances are the reactants in photosynthesis? Include the name and chemical formula of each substance in your answer. Carbon Dioxide CO2 and Water H2O b. Where in the organelle are these molecules stored before they are used in photosynthesis? These molecules are stored in the stroma c. Is photosynthesis an endergonic or exergonic reaction? Support your answer with evidence from Model 1. Photosynthesis is an endergonic reaction because the plant takes in sunlight energy (positive change) in order to complete the reaction. d. What is the energy source for photosynthesis? The energy source is sunlight 4. Photosynthesis occurs in two parts—the light-dependent reactions and the light-independent reactions. a. What is another nam [Show More]

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