Chp 8 * The Working Cell
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Chp 8 – Energy from Sunlight Part 1 Photosynthesis uses Light Energy to Make Food I. Structure of Chloroplasts A. ______________________ takes place in the chloroplast • ___________________ Chloroplast - organelle found in plant cells and some unicellular ___________________ organisms where photosynthesis takes place ___________________ B. Chloroplasts contain compounds called ______________ ___________ ___________________ ____________________________________________________________ • ___________________ ___________________ – a very common pigment in most plant ___________________ leaves _________________________________________________ ___________________ • _________________ contain the most chloroplasts o Guess what color chlorophyll is… ______________ C. ____________ – tiny pores in the “skin” of the leaf __________________ ___________________ ___________________ ___________________ _____________________________________________________________ ___________________ • Stoma are the lungs of the plant ___________________ • Veins, plants have them too! • Xylem _____________________________ from the plant roots to the leaves • ___________________ ___________________ ___________________ Phloem ___________________________ to other parts of the plant D. __________________ – _________________________________________ where the most photosynthesis takes place ___________________ ___________________ ___________________ E. The inner membrane of a chloroplast encloses _______________________ ___________________ __________________________ ___________________ F. Suspended in the stroma are many ________________________________ ___________________ Chp 8 – Energy from Sunlight Part 1 ___________________ • The thylakoids are arranged in stacks called ____________ • These stacks organize ______________________________ ___________________ ___________________ ________________________________________________ ___________________ ___________________ ___________________ ___________________ ___________________ ___________________ ___________________ 1. In which part of a leaf are most chloroplasts located? ___________________ ___________________ 2. How is a thylakoid related to a granum? ___________________ ___________________ 3. How do plants get carbon dioxide and release oxygen? ll. Overview of Photosynthesis A. In photosynthesis, _______________________________ are boosted “uphill” by the energy of sunlight • ___________________ ___________________ ___________________ ___________________ This results in an __________________________________ ___________________ B. These excited electrons are used to produce glucose (_______________) ___________________ by allowing _____________________________________ions to combine ___________________ • This causes the potential energy to be transferred to the glucose ___________________ Chp 8 – Energy from Sunlight Part 1 _________________ _________________ _________________ _________________ _________________ _________________ _________________ _________________ _________________ _________________ _________________ 1. Look very closely, what are the inputs into the light reactions? _________________ _________________ 2. Look very closely, what are the outputs of the light reactions? _________________ _________________ _________________ 3. Look very closely, what are the inputs into the Calvin Cycle? _________________ _________________ _________________ 4. Look very closely, what are the outputs of the Calvin Cycle? _________________ _________________ 5. What are the outputs of oxygen and sugar used for? C. Photosynthesis occurs in two Chp 8 – Energy from Sunlight Part 1 main steps: Light Reactions and The Calvin Cycle (Dark Reaction) ___________________ III. The Light Reactions A. Light Reactions convert the energy in sunlight to chemical energy • ___________________ _______________________________________ ___________________ ___________________ ___________________ 2. Chloroplasts use captured light energy _______________________ ___________________ splitting it into oxygen and hydrogen ions 3. The electrons and hydrogen ions are used to make _____________ ___________________ ___________________ ______________________________________________________ ___________________ 4. Chloroplasts also use the captured light energy ________________ ___________________ ________________________ ___________________ B. The overall result of the light reactions is the conversion of ____________ ___________________ _______________________________________ stored in NADPH and ATP ___________________ IV. The Calvin Cycle A. Calvin Cycle makes _____________________________________________ ___________________ ___________________ ______________________________________ and high energy electrons carried in NADPH B. The _____________________________________ provides the energy to make sugar C. The Calvin cycle is sometimes referred to as the “light-independent reactions” ___________________________________________________ ___________________________________ ___________________ ___________________ ___________________ ___________________ ___________________
