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Transcript
Name: _____________________________________________ Photosynthesis Period: _____ Photosynthesis uses the energy in sunlight to make sugars such as glucose from carbon dioxide and water. You will use 8 rectangles to represent the overall chemical equations for photosynthesis Divide a sheet of paper into 8 rectangles. For photosynthesis, prepare: ● four rectangles, each with one of these chemical formulas: C6H12O6, CO2, H2O, and O2, and the name of the molecule that each chemical formula represents ● one rectangle with → to represent a chemical reaction ● two rectangles with + ● one rectangle with sunlight 1. Arrange the eight rectangles for photosynthesis to show the overall chemical equation for photosynthesis. Copy this chemical equation into the box. Photosynthesis 1 Some of the glucose produced by photosynthesis is used to synthesize other organic molecules such as starch and cellulose, which are polymers of glucose. Other glucose molecules go on to cellular respiration which creates useable energy for the cells (ATP) from glucose. The sugars produced by photosynthesis are also used to make other plant molecules such as the amino acids which are the building blocks for proteins. 2. Circle one glucose monomer in each polymer in the figure. 3. The sugars produced by photosynthesis are used for two different purposes: ● Some of the sugar molecules are used to synthesize __________________________________. ● Other glucose molecules go through the process of ______________________ ________________ to produce ATP for the cells. When photosynthesis produces more glucose than the plant needs, the excess glucose is stored in starch molecules. Starch molecules can be broken down to provide glucose when glucose is needed for cellular respiration. 4. A plant needs to carry out cellular respiration throughout the day and night in order to produce the ATP which provides energy for the processes of life. Write “night” to label the arrow which shows how the plant gets the glucose needed for cellular respiration at night. multiple glucose molecules starch molecule 5. Do you think leaves have more starch molecules at the end of daylight or at the end of the night? Explain your reasoning. 2