1. Warm-Up #2(or 3) 11/28/11 Label the statement TRUE or FALSE
1) The entire process of Photosynthesis occurs only in the light.
2) The purpose of photosynthesis is to produce Oxygen and Glucose.
3) All organisms on earth depend on photosynthesis for energy.
4) Plants photosynthesis rates are effected by factors like temperature, rainfall, amount of sunlight.
5) Carnivorous plants (Venus Fly Trap) do not need to do photosynthesis.
6) Plants use the oxygen that they produce.

2. Photosynthesis
Unit 5

3. What are we learning? Essential Question: Objectives:
Would life on Earth exist without photosynthesis?
Objectives:
TSW differentiate between autotrophs and heterotrophs.
Stages of Photosynthesis

4. Where does the energy come from?
Comes from food
Food comes from the SUN

5. Autotrophs/Heterotrophs
- Are Producers
Organism that MAKES their OWN food
Use the SUN
Heterotroph
- Are Consumers
Obtain energy from other living things

6. Chemical Energy and ATP
Living things convert glucose to energy called Adenosine Triphosphate (ATP)

7. ATP (adenosine triphosphate)
Consists of:
Adenine
5-carbon sugar (ribose)
3 phosphate groups
Phosphates are the key to storing and releasing energy

8. Storing Energy ADP—Adenosine Diphosphate ADP + P  ATP
Only 2 phosphates
When a cell stores energy it ADDS a PHOSPHATE!!! ( = stored energy)
ADP + P  ATP

9. Releasing Energy
Breaks the chemical bond between the 2nd and 3rd phosphates
ATP ADP + P + energy

11. Using Biochemical Energy
Most cells only have a small amount of ATP
Enough to last only for a few seconds
Glucose stores 90 times the amount of chemical energy of ATP

12. Photosynthesis Big Picture:
Process of converting solar energy into chemical energy
Uses the energy of sunlight to convert water and carbon dioxide into high energy sugars and oxygen
Occurs in chloroplasts in leaves

13. Photosynthesis Equation

14. How Do Plants Capture Light?
Photosynthesis requires light and chlorophyll (part of the chloroplast)
Plants gather the sun’s energy with light absorbing molecules called pigments
Main pigment is chlorophyll (a and b)

15. Pigments Absorb all the colors EXCEPT the ones you see
Plants reflect green light (why they are green)

17. Inside a Chloroplast Site of photosynthesis Mainly in leaves
Contain saclike membranes—thylakoids
Stacks of thylakoids—grana
Thylakoids organize proteins and pigments into photosystems

18. What’s this NADP Stuff? Nicotinamide Adenine Dinucleotide Phosphate
NADP carries electrons produced by light reactions of photosynthesis
Consumed in the light-independent reactions of photosynthesis

19. 2 Stages of Photosynthesis
Light Dependent
Light Independent / Calvin Cycle

20. Light-Dependent Reaction
Requires LIGHT
Uses energy from light
to convert ADP to ATP
to convert NADP+ to NADPH
to split water which produces oxygen gas and H+

21. Light-Independent Reaction/Calvin Cycle
Does not require light
Uses energy held by ATP and NADPH from the light-dependent reactions to
make sugar—glucose, ADP and NADP+

22. Overview

23. H2O CO2 Light NADP+ ADP + P Calvin Cycle ATP NADPH Sugars O2
Chloroplast
NADP+
ADP + P
Light-
Dependent
Reactions
Calvin
Cycle
ATP
NADPH
Chloroplast
Sugars O2

24. Factors Affecting Photosynthesis
Amount of Water
Temperature
Intensity of Light

25. Metabolism Memorization
What comes out of photosynthesis must go into respiration
What comes out we call the product
What goes in we call reactants
What comes out of photosynthesis must go in to respiration

26. What comes out of photosynthesis must go into respiration
Glucose and Oxygen