1. PHOTOSYNTHESIS USES LIGHT ENERGY TO MAKE FOOD

2. PHOTOSYNTHESIS Process that converts light energy to _________________
Occurs in _________________ of green plants

3. CHLOROPLASTS Most are located in leaves— major site of photosynthesis
Contain pigment called __________________________
Gives chloroplasts their green color

4. CHLOROPLAST STRUCTURE
Enclosed by two membranes
Inner membrane encloses a thick fluid called stroma
Disk-shaped sacs called thylakoids are suspended in stroma
___________________: stack of thylakoids

5. CHLOROPLAST STRUCTURE

6. PHOTOSYNTHESIS EQUATION
sunlight
6 CO2 + 6 H2O  C6H12O6 + 6 O2
6 carbon dioxide water  glucose oxygen
Occurs in two main stages:
1. light reactions
2. __________________________

7. CHLOROPLAST STRUCTURE ORGANIZES PHOTOSYNTHESIS
Reactions take place in different areas of chloroplast:
Light reactions occur in thylakoid membranes
Calvin cycle occurs in the stroma

9. PHOTOSYNTHESIS and CELLULAR RESPIRATION
Photosynthesis Equation:
sunlight
6CO2 + 6 H2O  C6H12O6 + 6 O2
6 Carbon Dioxide Water  Glucose Oxygen
Cellular Respiration Equation:
C6H12O6 + 6 O2  6 CO H2O + ATP
Glucose Oxygen  6 Carbon Dioxide Water

10. LIGHT REACTIONS Convert energy in sunlight to chemical energy in steps
Chlorophyll molecules capture light energy (units called photons)
Captured energy is used to split water molecules  photolysis
H2O  O2 and H+ ions produced

11. LIGHT REACTIONS O2 escapes from leaf as _____________________________
H+ bonds to NADP+ (electron carrier molecule) forming NADPH
NADPH moves to stroma
ATP is produced by light energy

12. THE CALVIN CYCLE
____________ from light reactions provides energy to make glucose

13. THE CALVIN CYCLE
Calvin cycle reactions are also called the light-independent or dark reactions (can occur without direct light)
Cannot continue indefinitely without two inputs supplied by light reactions:
1. ATP
2. NADPH

14. THE LIGHT REACTIONS CONVERT LIGHT ENERGY TO CHEMICAL ENERGY

15. LIGHT ENERGY & PIGMENTS
________________________: part of the electromagnetic spectrum our eyes detect as different colors
 ROY G BIV
Pigments: chemicals that absorb, transmit, or reflect different wavelengths of light

17. What you need to know about the light reactions
Occur on thylakoid membranes
Get energy from photons of light
Reactants: H2O, light
End products: O2, NADPH, ATP

18. What you need to know about the light reactions
Destination of end products:
ATP and NADPH go to stroma (Calvin cycle)
O2 leaves as waste product

19. THE CALVIN CYCLE (Light Independent) MAKES SUGAR FROM CARBON DIOXIDE

20. What you need to know about the Calvin cycle
What are the reactants?
1. RuBP
2. NADPH
3. ATP
4. ____________

21. CALVIN CYCLE What are the end products? - 3-carbon sugar G3P  used by
plant cells to produce more
complex carbohydrates
- glucose
- ______________________
- cellulose

22. CALVIN CYCLE Where does energy for Calvin cycle come from?
- ATP produced in light reactions
Where does the Calvin cycle occur?
- stroma of chloroplast

23. SUMMARY OF PHOTOSYNTHESIS

24. SUMMARY OF PHOTOSYNTHESIS
6 CO2 + 6 H2O  C6H12O6 + 6 O2
LIGHT REACTIONS:
Occur on thylakoid membranes
Convert light energy to chemical energy of ATP
Use reactant H2O from the equation and releases product O2

25. SUMMARY OF PHOTOSYNTHESIS
CALVIN CYCLE:
Occurs in stroma of chloroplast
Uses ATP and NADPH from light reactions
Uses the reactant CO2 from the equation and produces _________