- Photosynthesis is a two-stage process where light energy is converted to chemical energy. The light reaction uses light energy to produce ATP and NADPH. The dark reaction uses these products to fix carbon and produce glucose. - The light reaction takes place in the thylakoids and splits water, producing oxygen and energized electrons. These electrons are used to produce ATP and NADPH. - The dark reaction occurs in the stroma and uses ATP and NADPH to fix carbon from CO2 into glucose, producing oxygen as a byproduct. This provides the basic energy and materials for plant growth and survival.

1. Least Mastered Learning CompetencyCompare the light and dark reactions in photosynthesis.STRATEGIC INTERVENTION MATERIALIN SCIENCE AND TECHNOLOGY II

2. Where’s my Food?

3. Guide cardWhat is photosynthesis?Students NoteAfter reading this page I still do not understand Now I understand what the lesson is all about.What I think about the things to do. Easy HardFor this lesson, I want to study it Alone With one of my classmates. Within the groupPlants, algae, and other chlorophyll-bearing organisms capture light energy and use it to produce food. This energy is passed on to animals that feed directly on plants or on other animals that have fed on plants. The entire process of capturing light energy to produce food is called photosynthesis. The equation is:6CO2 + 6H2O + light chlorophyll (energy)C6H12O6 + O6

4. Photosynthesis is two stage process. Thelight reaction that took place in the grana of the chloroplast and the dark reaction that took place in he stromaof the chloroplast.In the light-dependent process, light strikes chlorophyll in such a way as to excite electrons to a higher energy state. In a series of reactions, the energy is converted (along an electron transport process) into ATP and NADPH. Water is split in the process, releasing oxygen as a by product of the reaction. The ATP and NADPH are used to make C-C bonds in the dark reaction. The photosynthetic process, in which food(sugar) molecules are formed from the carbon dioxide in the atmosphere with the use of ATP can occur in the dark as long as ATP is present.Remember….

5. Photosynthetic General Equation

6. What happens in photosynthesis

9. Activity card 1Arrange the jumbled letters to produce a word. _________ 1. TAP- formed during light reaction. _________ 2. YGXONE- gas given off by plants. _________ 3. TRELECON- energized during reaction. _________ 4. AWTRE- splits into hydrogen and oxygen. _________ 5. LOPHYOLRCHL- traps light energy.

10. Activity card 2Study the diagram below and complete it using the words in the box.SUNLight energyIs absorbed byEnergy carrier that becomes ENERGIZED CHLOROPHYLL that supplies energy tosplitaddandp2HtoThat are trapped byNADP (H acceptor)That is released( energy carrier)formingformingThat stores energyFor use in the dark reaction

11. Word boxfor activity card 2Water OxygenNADPH2 WaterChlorophyll

12. Activity card 3THE DARK REACTIONThe fixing of carbon in a carbohydrateCombines withA five carbon sugar in the chloroplast ( CO2 acceptor)That is gain usedTo combine with CO2by combining and substitutingH for a phosphateTo formA very unstableandRDPThat splits quickly and formsThat can be usedAs nutrient or converted toH2O that is releasedAs a by- productPGA, a 3-carbon compoundand formsthat combines with2H supplied by NADPH2 from the light reaction ( energy supplied by conversion of ATP to ADP )

13. Word Boxfor Activity Card 3PGAL 6 carbon sugarADP 2 moleculesGlucose Carbon dioxide

14. Check it out!Study the following illustrations below. Differentiate each stage of photosynthesis.Assessment Card 1Students NoteWhat I already know about this page? ______________________________________What I learned from this page?______________________________________What I still want to know about this page? ______________________________________What reactions occur?AB

15. Assessment Card 2.Self-checkEncircle the letter of the correct answerWhich of the following reactions is also known as photo phase? a. Light dependent b. Light independent c. AnaphaseWhich of the following reactions is also known as synthesis phase? a. Light dependent b . Light independent c. Metaphase3. What kind of energy is used to split two molecules of water? a. Light b. Proton c. Neutron 4. What is the energy source of the cell? a. NAD b. ADP c. ATP5. What is made up of 5-carbon sugar and an important carbon dioxide acceptor? a. ATP b. RUDP c. PGAL

16. 6. Which co-enzyme capture the hydrogen molecules? a. NADP b. RUDP c. PGALHow many carbon, hydrogen, and oxygen are present in a glucose molecule? a. C6H12O6 b. C5H11O2 c. C12H6O128. What are the end product in dark reactions? a. ATP and NADPH b. sugar c. enzyme9. In which part of the cell does light reactions take place? a. thylakoids b. stroma c. stomata10. In which part of a plant cell does dark reactions take place? a. thylakoids b. stroma c. stomata

17. Enrichment CardSentence completion…The ___________ is the conversion of light energy into chemical energy. The light dependent reaction includes the conversion of __________ energy into electron energy, then into short-term energy storage __________. The __________ reaction involves the conversion of short-term energy storage to long term energy storage ___________.Students noteWhat I already know about this page? __________________________________________________________What I learned from this page?__________________________________________________________What I still want to know about this page? __________________________________________________________

18. Spot the Difference

19. Reference CardDela Cruz, Susana B.Biology ( Pheonix Next Century)Agar, Irene C. et.al.Science and Technology IIInternet Explorer

20. Answer cardActivity No. 11. ATP2. oxygen3. electron4. water5. chlorophyllActivity No. 2ChlorophyllWaterOxygenNADPH2ATP

21. Activity No. 3CO26 carbon sugarPGALGlucoseADPAssessment No. 1Dark reaction or light –independent reactionLight reaction or light- dependent reaction

22. Assessment No. 2.1. A 6. A 2. B 7. A3. A 8. B4. C 9. A5. B 10. B Enrichment Card1. Photosynthesis2. Light3. ATP4. Dark5. Glucose