Subject Biology 1 Topic Photosynthesis Grade Level and Quarter Grade 12; 1st semester Time Allotment 90 minutes Learning Competencies and Objectives At the end of 90 minute period, the students are expected to: 1. Differentiate the two stages of photosynthesis. 2. Identify the important molecules involved in light reactions and Calvin cycle 3. Describe the events and processes happening during light reactions and Calvin cycle ELICIT MATERIALS “4Pics One Word” Show to students different pictures calling for specific words. Let them guess what every pictures mean. Answers: Oxygen, Sunlight, Glucose, Reaction, Carbon dioxide, and Water. Key Question: What single word can you associate out from the answers? Fact Check: Are plants the photosynthesis? only organism that can perform ENGAGE “Choose Me, Stand with Me” Key Questions: 1. Which of the two is the simplified chemical equation of Photosynthesis? 2. Can you explain the simplified chemical equation of photosynthesis? 3. What type of reaction is the chemical equation of photosynthesis? 4. What do you think is the organelle/s in the plant cell in which the reaction of photosynthesis occurs? 5. How many stages is photosynthesis divided into? What are they? EXPLORE A. Explore though a video presentation the structure of Chloroplast in plant cell. Ask the following questions to assess the uptake of understanding of students from the video presentation. 1. What do you call the stack of thylakoids? 2. What do you call the fluid like substance found inside the chloroplast? The video presentation and the diagram are in the PowerPoint presentation. 3. What specific part in the Chloroplast where pigment (Chlorophyll) can be found? 4. Where do you think light reaction and Calvin cycle occur? B. Present the general diagram of the light reaction and Calvin cycle. 1. The students examine the diagram. 2. Ask them the following questions. What molecules are needed in light reaction and Calvin cycle? What are the products in light reaction and Calvin cycle? EXPLAIN Class Discussion The teachers will present a PowerPoint presentation discussing the two stages of photosynthesis, important molecules involved in each stage, their reactants and by-products and the important events and processes occurring at each stage. ELABORATE Questions: 1. What happens to G3P after its release from the cycle? 2. To make one molecule of G3P, the chloroplast needs how many molecules of CO2, ATP and NADPH? 3. Do you agree that photosynthesis and cellular respiration are reverse process? Key Concept: The relation of the oversimplified equation of photosynthesis to the light reaction and Calvin cycle. EVALUATE COMPLETE THE TABLE Stages Location Light reactions Calvin Cycle Input Output MULTIPLE CHOICE 1. The main products of the light reactions are: a. NADPH and FADH2 b. NADPH and ATP c. ATP and FADH2 d. ATP and Carbon dioxide 2. The majors products of Calvin cycle is: a. Rubisco b. Pyruvate c. ATP d. Glyceraldehyde-3-phosphate 3. The Calvin cycle begins with the attachment of carbon dioxide to which of the following? a. RuBP b. Glucose c. 3-phosphoglycerate d. ATP 4. Glyceraldehyde-3-phosphate and 3-phosphoglycerate are three carbon molecules produced during Calvin cycle. a. True b False 5. The Calvin cycle functions to construct carbohydrates from carbon dioxide. a. True b False EXTEND A. Watch YouTube videos about photosynthesis by clicking the links below. https://youtu.be/D2Y_eEaxrYo https://youtu.be/-rsYk4eCKnA https://youtu.be/CMiPYHNNg28 B. Design a photosynthesis model through the use of chips and other cut-outs and describe the process of light reaction and Calvin cycle. References: Grade 12 Biology 1 e-module Online reference: https://www.khanacademy.org/science/ap-biology/cellular-energetics/photosynthesis/a/light-dependenreactions https://youtu.be/D2Y_eEaxrYo https://youtu.be/-rsYk4eCKnA https://youtu.be/CMiPYHNNg28 Prepared by: MONER A. ABDUL YUKIE BARENA 4BSE-D (Science) Field Study Student Secondary Education Department College of Education University of Southern Mindanao
