1. Photosynthesis

2. Chloroplast Draw, label and function Stroma Thylakoid
Thylakoid membrane
Granum
Chlorophyll

3. Mesophyll tissue Draw, label and function Stomata Mesophyll
Lower/upper epidermis
cuticle

4. Solar energy
42% of solar radiation passes through atmosphere and reaches the surface
Visible light – used in vision and photosynthesis, makes up most of 42%
Pigments (photons) absorb certain wavelengths of light – absorption spectrum

5. Absorption/Action Spectrum
Chlorophylls
a, b – absorb blue and red, reflect green (why look green)
Carotenoids – absorb violet-blue-green, look yellowish orange (see this in Fall leaves when chlorophyll breaks down
Spectrophotometer – measures amount of light that goes through a sample, calculates how much is absorbed.
Action Spectrum – use production rate of oxygen as a means to measure the rate of photosynthesis at each wavelength of light

6. photosynthesis
C.B. van Niel – oxygen given off comes from water, not carbon dioxide (1930)
Redox reaction
6CO2 + 6H2O (solar energy) yields C6H12O6 + 6O2
Carbon dioxide is reduced to a carbohydrate
Water is oxidized to Oxygen

7. Reactions 1905 – F.F. Blackman – involves 2 reactions Light Reactions
Absorption of light in thylakoid membrane
Electrons are energized and move down ETC
Energy is captured, ATP production
NADP+ is an electron carrier and becomes NADPH
Calvin Cycle reactions – Stroma
Carbon dioxide taken up, reduced to carb.
Use energy from ATP and NADPH which return to light reaction to cycle again

8. Summary of Photosynthesis
Solar energy (sun) 
chemical energy (as ATP and NADPH) 
chemical energy (carbohydrate)
That’s ALL!!